An acronym, standing for, "shitting in pants laughing."
Joe: "Hey man, I had a flat tire yesterday and had to wait 3 hours for AAA to pick me up"

Cool Kid: "sipl"
by 8500x July 31, 2010
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A person who devote themselves to disciplines that lead to true love, sincere kindness, and honest compassion.
That siple was a regular good Samaritan... I hope we run into someone like her again some day!!
by lilpix6 December 29, 2011
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A moderately common surname, usually associated with dougebagginess, 500-pound people, and mid-day drunken voicemails.
Person 1: I got twenty calls from Siple last night!
Person 2: Shouldn't he have been at his Overeaters Annonymous Meeting?
by PoooopSoda May 21, 2009
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