| No. | Term | Definition |
|---|---|---|
| 1. | A miss | An unsuccessful attempt. |
| 2. | Abort | Stop before completion. |
| 3. | Backfire | Produce opposite of intended. |
| 4. | Bad showing | Poor performance. |
| 5. | Balk | Hesitate and refuse to proceed. |
| 6. | Blow it | Mess up an opportunity. |
| 7. | Botch | Do badly; ruin. |
| 8. | Break down | Stop functioning. |
| 9. | Bungle | Handle clumsily; botch. |
| 10. | Choke | Freeze under pressure. |
| 11. | Clunker | Something that works poorly. |
| 12. | Collapse | Fall apart suddenly. |
| 13. | Come up short | Not reach the needed level. |
| 14. | Compromise | Weaken by conceding too much. |
| 15. | Conk out | Stop working abruptly. |
| 16. | Crash | Break down suddenly. |
| 17. | Dead on arrival | Unworkable from the start. |
| 18. | Derail | Throw off course. |
| 19. | Die | Cease functioning. |
| 20. | Disappoint | Not meet expectations. |
| 21. | Dissolve | Break up or disintegrate. |
| 22. | Drop out | Quit before finishing. |
| 23. | Drop the ball | Miss a responsibility. |
| 24. | Dud | Complete lack of success. |
| 25. | False start | Begin then fail to continue. |
| 26. | Fiasco | Embarrassing, complete failure. |
| 27. | Fizzle | End weakly; peter out. |
| 28. | Flop | Be a complete disappointment. |
| 29. | Fold | Give up; yield. |
| 30. | Founder | Break down; fail to progress. |
| 31. | Fracture | Break under pressure. |
| 32. | Go bust | Become bankrupt; collapse. |
| 33. | Go haywire | Malfunction; behave erratically. |
| 34. | Go south | Deteriorate quickly. |
| 35. | Go wrong | Turn out badly. |
| 36. | Grind to a halt | Stop after slowing down. |
| 37. | Gum up | Clog and prevent working. |
| 38. | Hit a dead end | Reach an impasse. |
| 39. | Hit the wall | Suddenly lose momentum. |
| 40. | Hold back | Not give full effort. |
| 41. | Implode | Collapse inward suddenly. |
| 42. | Incapable | Not able to do it. |
| 43. | Inoperable | Not functioning or workable. |
| 44. | Jam | Get stuck; stop moving. |
| 45. | Jinx | Bring bad luck; spoil. |
| 46. | Kink | A snag that blocks progress. |
| 47. | Kneecap | Cripple; prevent from succeeding. |
| 48. | Lag | Fall behind; lose pace. |
| 49. | Lapse | Temporary decline or mistake. |
| 50. | Let down | Disappoint someone. |
| 51. | Lose | Not win; be defeated. |
| 52. | Lose ground | Fall behind in position. |
| 53. | Lose steam | Run out of energy. |
| 54. | Malfunction | Fail to work properly. |
| 55. | Mess up | Make a mistake; botch. |
| 56. | Miscarry | Not come to fruition. |
| 57. | Misfire | Not work as intended. |
| 58. | Miss | Fail to hit or achieve. |
| 59. | Miss the mark | Be inaccurate or inadequate. |
| 60. | Misstep | A wrong move. |
| 61. | Muff | Botch; handle badly. |
| 62. | Neglect | Fail to give proper attention. |
| 63. | No-go | Not possible or allowed. |
| 64. | Nonstarter | Idea that cannot succeed. |
| 65. | Not deliver | Fail to provide promised results. |
| 66. | Not pan out | Not turn out well. |
| 67. | Not work | Be ineffective. |
| 68. | Out of order | Not working. |
| 69. | Overreach | Attempt too much; overextend. |
| 70. | Overrun | Exceed limits; go out of control. |
| 71. | Panic | Lose control under stress. |
| 72. | Peter out | Gradually fade away. |
| 73. | Poop out | Tire; stop functioning. |
| 74. | Punt | Avoid deciding; defer action. |
| 75. | Quit | Stop trying. |
| 76. | Regress | Return to a worse state. |
| 77. | Ruin | Damage beyond repair. |
| 78. | Run aground | Get stuck; stop progressing. |
| 79. | Run out | Be depleted; end. |
| 80. | Screw up | Make a serious mistake. |
| 81. | Setback | A reversal of progress. |
| 82. | Short-circuit | Fail due to an electrical fault. |
| 83. | Shortcoming | A deficiency or flaw. |
| 84. | Shortfall | Amount lacking; deficit. |
| 85. | Shut down | Stop operating. |
| 86. | Slip | Make a minor mistake. |
| 87. | Sputter | Work unevenly; falter. |
| 88. | Stall | Stop making progress. |
| 89. | Strike out | Fail in an attempt. |
| 90. | Stumble | Make an error; falter. |
| 91. | Tank | Perform very poorly. |
| 92. | Topple | Fall from stability. |
| 93. | Trip up | Cause to make a mistake. |
| 94. | Undercut | Weaken or diminish. |
| 95. | Underdeliver | Provide less than promised. |
| 96. | Undermine | Erode support or success. |
| 97. | Underperform | Perform below expectations. |
| 98. | Unravel | Come apart; break down. |
| 99. | Upend | Disrupt; overturn plans. |
| 100. | Vanish | Disappear; cease to exist. |
