Punch lines are the last part of a joke, often the most memorable and humorous. The two crossword solutions for the term 'punch lines' are OOFS (4 letters) and OWS (3 letters). OOFS stands for 'One-liners, Observations, Funny Stories', while OWS stands for 'One-Word Statements'. Both terms refer to punch lines that are either short one-liners, observations, funny stories, or one-word statements.