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.
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.