Patrick: Hey dude, i saw your new girlfriend today, shes so ugly it made me lolshird!
Steve: Well thats a shame, seen as im dating your sister.
Patrick: Oh.
Steve: lolshird. Dumbass.
A variation of lol. Lolshisoym stands for "laughed out loud so hard I shit on your mother". Or, in other words, an expression of an example in which one laughs extremely hard.
"Dude, I just took a slam on the boss' secretarie's desk!!"