“Go belly up” began with the image of a dead fish floating upside down. Today it often means fail, collapse, or go bankrupt.

“Cut and dried” means settled in advance. The phrase likely comes from herbs prepared ahead of time, then stored ready for later use.

Mocha comes from Mokha, a Yemeni port once central to the coffee trade. The drink name began with coffee, not chocolate.

“Above board” likely grew from card playing, where keeping hands visible above the table suggested fairness and no hidden tricks.