noun used by Steven Stifler from American Pie 1 & 2, and American Wedding. It's similiar to a person who likes gapage (anal sex) or anything inserted into their rectum.
"Happy Fuck Day, Assmo!" - Stifler
di Becka Contreras 22 giugno 2004
An invader of a bovine anal cavity.
"Man Eli your such a assmo"
di Tim Cordova 10 febbraio 2004
someone who likes things insertded into there ractom or another name for deushbag, basically.
That guy is such an assmo
di Derock 29 maggio 2004