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To laugh and pass wind (fart) simultaneously.
Hey Jude, what was that suspicious sound that came from your buttock while you were laughing? I'm sorry Peter, i larted!
by Vilem Benjamin L. October 06, 2005
1: a bloody fart (New Norberian English)
2: a callous or loathsome individual
(1) "The farting contest was going along swimmingly until april let rip a juicy lart"

(2) Keep your hands off the merchandise you pathetic little lart!
by David January 07, 2005
To laugh until one looses the ability to control bodily fuctions, usually emitting an anal explosion.
Dude! Every time you tell me that joke, I lart.
by ButtaKnife September 26, 2004