The Nasty Boys are a group of supervillain mutants appearing in American comic books published by Marvel Comics. This group exists in Marvel's shared universe, known as the Marvel Universe. These characters are the personal strike force of X-Men and X-Factor nemesis Mister Sinister. The Nasty Boys should not be confused with the Marauders, who were a group of mercenaries brought together by Mister Sinister to specifically kill the Morlocks.