Bitter humor is a type of humor that relies on sarcasm, IRONY, and cynicism to make its point. The crossword solutions for the term 'bitter humor' are BILE (4 letters) and IRONY (5 letters). BILE is a bitter, yellow-green fluid produced by the liver and stored in the gallbladder that aids in digestion. IRONY is a figure of speech in which words are used in such a way that their intended meaning is different from the literal meaning.