1 definition by 8500x

Top Definition
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"
#lol #lhh #laughing #acronym #texting #txting #shitting #pants
by 8500x July 31, 2010
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