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1 definition by emillionaireeex0

Acronym for "biting my thumb". Most commonly used in the playwrite Romeo and Juliet by William Shakespeare. Used as an insult similar to "smh" (shaking my head).
A)"Omg I can't believe I just said that!"
B)"I can't believe you either. BMT, man."
by emillionaireeex0 March 20, 2011