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n. Pertaining to males only, usually in a sitting-down position; a fart, usually intense, that escapes forwards, not backwards. Upon its treacherous escape, the fart blasts one's ballsack with an inferno of hot, stinky air.
Son: Dad, I was on a date at the movies last night and I totally launched a sackblaster during a quiet scene.

Father: I guess SOMEBODY didn't get their balls licked last night?

Son: Well, she majorly shit her pants right before the credits rolled, so I wasn't tryin' to mess with that!

by Bouchet January 04, 2006
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