The term 'QUICK JOKE' can be broken down into two crossword solutions: GAG (3 letters) and ONELINER (8 letters). A GAG is a joke or prank that is intended to be humorous. It is usually short and often involves physical comedy, such as a slapstick routine. A one-liner is a joke that consists of a single sentence. It is typically witty and relies on wordplay for its humor. Both gags and one-liners are popular forms of comedy, often used in stand-up routines and sitcoms.