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Laughing hard enough that you fart (lart, definition 3), only to discover that it was a shart.
"Um, holy shit, I just shlarted. I feel so gross... and that joke wasn't even that funny."
by ZombieShotgun October 14, 2009
when you shart in your sleep and don't realize it until the next morning
Bob: Dude, why does your bed smell like shit?
Tim: Aw man, I must have shlarted last night.
by el_jay_ess July 23, 2009
When you fart, and shit comes out too!
Dave - Why'd you run to the washroom?
John - Because I just shlarted
by tomboy122 February 20, 2009