/bus"teuhr/ , n. Informal.
1. a person who breaks up something: crime busters.
2. something that is very big or unusual for its kind.
3. a loud, uproarious reveler.
4. a frolic; spree.
5. ( cap. ) (used as a familiar term of address to a man or boy who is an object to the speaker's annoyance or anger): Look, Buster, you're standing in my way!
[ 1825-35, Amer.; BUST 2 + -ER 1 ]