Retarted
The wrong spelling of the word Retard. Ironically, calling someone a retard and misspelling the word, actually makes the accuser a retard. Retarted is not a word, Retard is. Don't make yourself look retarded, by misspelling the word retard.

Commonly used by dumb ass YouTube commenter's, and dumb whores on facebook.
Jon: Tim, you're so retarted.
Tim:Well Jon, I'm not the retard who misspelled the word retarded.

Jon:.... well played.