• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
Home of English Grammar
  • Home
  • Course
  • Exercises
  • Grammar Rules
  • Matches
  • Posts
  • Tools
    • Grammar Checker
    • Very Replacer
    • Word Counter
  • Vocabulary Lists
  • Archives
    • Social Media Posts
    • Writing Guides
  • Sign in
  • Join free

100 Animal Idioms and Expressions

April 3, 2026

100 Animal Idioms and Expressions

No. Term Definition
1. A bird in the hand A sure thing beats a risk.
2. A little bird told me I heard it from someone.
3. A wild goose chase A futile search.
4. Act like a fish out of water Seem awkward in a place.
5. All bark and no bite Threatening but not harmful.
6. Ants in your pants Restless; unable to sit still.
7. As busy as a bee Very busy.
8. As happy as a clam Very content.
9. As proud as a peacock Very proud or vain.
10. As sly as a fox Very cunning.
11. As stubborn as a mule Very stubborn.
12. As the crow flies In a straight line.
13. Bark up the wrong tree Blame or pursue the wrong thing.
14. Be a guinea pig Be used for an experiment.
15. Be the black sheep Be the family outsider.
16. Beat a dead horse Waste effort on the past.
17. Bee in your bonnet An obsession or fixation.
18. Big fish in a small pond Important in a small place.
19. Birds of a feather Similar people stick together.
20. Blind as a bat Having very poor sight.
21. Bull in a china shop Clumsy and reckless.
22. Busy as a beaver Very hardworking.
23. Butterflies in your stomach Nervous excitement.
24. Buy a pig in a poke Buy without checking first.
25. Call the dogs off Stop attacking or pursuing.
26. Cat got your tongue? Why are you silent?
27. Cat nap A short sleep.
28. Cat’s out of the bag A secret is revealed.
29. Chickens come home to roost Past actions bring consequences.
30. Clam up Become silent.
31. Cold turkey Quit abruptly.
32. Come out of your shell Become more confident.
33. Copycat Someone who imitates others.
34. Cry wolf Give a false alarm.
35. Curiosity killed the cat Being nosy brings trouble.
36. Dark horse Unexpected winner or contender.
37. Dog and pony show A flashy presentation.
38. Dog days The hottest summer period.
39. Dog in the manger Hoarding what you won’t use.
40. Dog-eat-dog Ruthlessly competitive.
41. Dumb bunny A foolish person.
42. Eager beaver Overly enthusiastic worker.
43. Eat like a bird Eat very little.
44. Eat like a horse Eat a lot.
45. Elephant in the room An obvious issue ignored.
46. Every dog has its day Everyone gets a chance.
47. Fishy Suspicious or not quite right.
48. Flea market Market selling secondhand goods.
49. Flip-flop like a fish Change positions repeatedly.
50. Fly on the wall Unseen observer.
51. Follow the herd Do what others do.
52. For the birds Useless or worthless.
53. Free as a bird Unrestricted; able to go anywhere.
54. Get your ducks in a row Get organized.
55. Go hog wild Behave wildly.
56. Go to the dogs Decline in quality.
57. Guinea pig A test subject.
58. Have a cow Overreact; get very upset.
59. Have a whale of a time Have a great time.
60. Have ants in your pants Be very restless.
61. Hold your horses Wait; slow down.
62. Horse around Play roughly; fool around.
63. In the doghouse In trouble or disfavored.
64. In the lion’s den In a dangerous place.
65. It’s raining cats and dogs Raining very heavily.
66. Jackass A stubborn or foolish person.
67. Kill two birds with one stone Achieve two goals at once.
68. Knee-high to a grasshopper Very small or young.
69. Let sleeping dogs lie Avoid stirring up trouble.
70. Like a bull at a gate Charge in aggressively.
71. Like a cat on hot bricks Very nervous and restless.
72. Like a fish out of water Uncomfortable in surroundings.
73. Like herding cats Hard to manage people.
74. Lion’s share The largest part.
75. Look like the cat that ate Look very smug.
76. Make a beeline Go straight to something.
77. Monkey business Mischief or dishonest behavior.
78. More than one way to skin a cat Many ways to do something.
79. Night owl Someone active late at night.
80. No spring chicken Not young anymore.
81. On the lam Fleeing from the law.
82. Open a can of worms Create more problems.
83. Paper tiger Seems threatening but is weak.
84. Play possum Pretend to be asleep or dead.
85. Quick as a bunny Very fast.
86. Rat on someone Betray; inform on someone.
87. Rat race Frenzied, competitive routine.
88. Red herring A misleading clue.
89. Sacrificial lamb Someone blamed to protect others.
90. Scapegoat Person unfairly blamed.
91. Sick as a dog Very ill.
92. Smell a rat Suspect a trick.
93. Snake in the grass A hidden, treacherous person.
94. Social butterfly Person who socializes widely.
95. Sow wild oats Behave recklessly when young.
96. Spill the beans Reveal a secret.
97. Straight from the horse’s mouth From the original source.
98. Take the bull by the horns Face a problem directly.
99. Talk turkey Speak frankly.
100. The bee’s knees Excellent; outstanding.

Improve your English grammar, vocabulary and writing

We take you step by step from beginner to advanced, even if you struggled with English at school or have always had trouble remembering the rules.

  • 10 modules, 112 lessons and 730 questions
  • Just log in and learn anytime and anywhere
  • Your progress is saved in your account
  • Download the 2027 Grammar Guide (PDF)
Join free

Already have an account? Sign in

See what’s in the course

Primary Sidebar

2.4M760.9K165.9K

Free 2027 Grammar Guide

  • Download Grammar Guide (PDF)
  • Online grammar course, A1 to C2
  • Weekly exercises and vocabulary
  • Join over 3 million English learners

We respect your privacy. Unsubscribe anytime.

Already have an account? Sign in

Grammar Checker - Try Now

Matches Rankings

    No results yet. Be the first to finish today’s Daily.

      No results yet. Be the first to finish today’s Daily.

        No results yet. Be the first to finish today’s Daily.

          No results yet. Be the first to finish today’s Daily.

          Play Matches

          Latest Posts

          • 100 Best Synonyms for “Issues” November 4, 2026
          • Apparent vs. evident: seeming or clear? November 4, 2026
          • 100 Best Synonyms for “Wanted” November 4, 2026
          • 100 Best Synonyms for “Influenced” November 4, 2026
          • 100 Best Synonyms for “Retrieve” November 4, 2026
          • Hairdresser Vocabulary Exercise November 4, 2026
          • Must and Have To for Obligation Exercise November 4, 2026
          • 100 Best Synonyms for “Chic” November 4, 2026
          • 100 Best Synonyms for “Vision” November 4, 2026
          • 100 Best Synonyms for “Inevitable” November 4, 2026
          Home of English Grammar

          Free English grammar exercises, rules and vocabulary lists, with new exercises every week. Join the leading English grammar site with over 3 million followers.

          Join free

          Learn

          • Exercises
          • Matches
          • Grammar rules
          • Vocabulary lists
          • Writing guides
          • Online tools

          More

          • Top social media posts
          • Various posts
          • Contact

          Account

          • Join free
          • Grammar Course
          • Free grammar guide (PDF)

          Copyright © 2026 EnglishGrammar.org

          • Disclaimer
          • Privacy policy
          • Terms
          • Sitemap