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1. adjective Utterly bizarre, disproportionate, or disfigured in appearance, as suggestive of genetic mutation. The creature had these mutant eyes, all misshapen and quivering, that didn't blink so much as roll back into their sockets briefly every few seconds.
2. adjective Extremely and abnormally large, especially that which grows in the ground. My uncle won another prize at the country fair for the mutant pumpkins he's been growing.
3. noun Someone or something that is bizarre, disproportionate, or disfigured in appearance, as suggestive of genetic mutation. Would you look at the size of that mutant! He must be nearly eight feet tall! As if I would be caught dead on a date with an ugly mutant like him!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a total jerk; a social outcast. (Also a term of address.) Sam, you act like such a mutant!
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.