It is social media shorthand for -Shitting in My Pants Laughing-
Used for when LOL and LMAO are just not enough to express how hilarious Someones fucking post, statement or picture actually was.
someone posts "Whats the difference between Michael Jackson and Neil Armstrong?
Neil was the first to walk on the moon and Michael likes to fuck little boys"
You reply "SIMPL"
5👍 1👎