Acronym stands for: Loud but not toxic

A fart that can be heard by everyone in the room you are in but releases little to no odor.
Person 1: I just ripped an LBNT in class.
Person 2: Oh man, did it reek?
Person: No. Didn't you just hear me say it was an LBNT?
by Platitudinous November 19, 2014
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