When one needs the lavatory immediatley or one will cak shit their pants.
"Jamie had too much dodgy beer, he's now gonna have a bum explosion"
by Twinklebabe August 29, 2008
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The act of setting on fire one's fart and lighting a fuse on an explosive with said fart.
Billy set off fireworks on the Fourth of July with his explosive bum breathe.
by Wizard Lizard March 28, 2014
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