This is an expansion on the commonly used term retard. more exclusively a shorter version of the excellent remark of F+++IN RETARD. This can be used in a wide variety of situations and is just down right hilarious.
person #1: "Hey so have you talked to soandso today?
you: "God, I hope not! last time I called him that FUCTARD talked forever and wouldnt let me off the phone!"
Fucking retarded. Combination word in the tradition of fugly and fularious. Of course, less to do with actual retardation as much as the common slang use of the term meaning incredibly lame or stupid.