fucktard

Fucktard consists of the two words fuck+retard, which becomes fucktard (duh).
(Mainly used towards teachers)

Teacher: Colton, where's your homework?
Colton: Eh, I was hangry so I ate it.
Teacher: Colton... This is the third time this week! You need to start eating food instead of your homework!
Colton: Hey u listen to me u lil' fucktard! Stfu b4 I fuck u up!