meg:the one you made out with?
sue; yeah well he keeps texting me
meg; gosh hes such a keifer!
Not to be confused with Keith, which is a really fat joint, though the term probably originated from people somehow misusing Keith for Keif.
2. Noun: XD <-----that face.
2. Wipe that keifer off your face before I do it for you.
Verb: The act of owning someone.
2. Man, when you said "shut up"...couldn't you have thought of something more keifer than that??
3. You totally keifered that guy in the face!