To foop (fart + poop) and pee at the same time. Often difficult to manage.
DUDE I just feeped. It was incredible.
To spray semen upon someone, thus avoiding insemination
Dude 1: How will you defeat the bear?
Dude 2: I will onseminate him, and he shall be ashamed.
v. to turn any phrase into an abbreviation or acronym and use it as if everyone knows what you are talking about
"ICGTSOVOMFWTFG."
"Tommy, stop Pfeiffering. God."