Top Definition
1. An acronym meaning "it might be bad."

2. An acronym meaning "I might be black."
Person 1: I want to date your ex. Are you ok with that.
Person 2: Don't do it: imbb.

Person: I have a large penis. Imbb.
#black #acronym #cantaloupe #bad #inadvisable
by lsmnr November 15, 2010
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