You know why people hate you? It's not because you're mutants. It's because you're all a bunch of *&!@£'s!
~ Spider-Man

Mutants are creatures or people born or created with unique genetic defects that often result in highly abnormal traits and even superhuman abilities. Villains who fit this description can be listed here.

Not to be confused with those who are Mutated, Bio-Engineered or Mechanically Modified and start life normal but are changed later.