Short for "Shit my pants I laughed so hard." Also used as IJSMPILSH (I just shit my pants i laughed so hard). The phrase can be used as a more expressive and more graphic version of the classic 'lol' or 'rofl.' This abbreviation was created by Axel K. and Josh H. during biology class in 2006.
by Axel Kammerer February 11, 2008
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