Also found in: Dictionary, Thesaurus, Medical, Financial, Acronyms, Encyclopedia, Wikipedia.
1. n. a bowel movement; an act of defecation. (Mostly a euphemism used with children.) If I don’t have a BM soon, I’m gonna die.
2. n. a disgusting and annoying person. (Also a term of address. A humorous way of calling someone a shit. Usually objectionable.) The new guy has to be the world’s worst BM.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.