Definition of "wart"

wart

/wɔːt/

noun
plural warts
1. (pathology) A type of deformed growth occurring on the skin caused by the human papillomavirus (HPV).
2. Any similar growth occurring in plants or animals, such as the parotoid glands in the back of toads.
3. (informal, figurative) Anything unsightly or undesirable; a blemish.
  Quotations
  Things that look too good to be true usually are, and every company has some warts that need to be taken into account.
  2011, Pat Dorsey, The Five Rules for Successful Stock Investing
4. (programming, slang, derogatory) Any of the prefixes used in Hungarian notation.
  Quotations
  Hungarian warts suck big time! If you need them, your functions are too big and your class interface is much too fat.
  1998, Chris Ahlstrom, “Hungarian notation”, in microsoft.public.vc.language (Usenet)
  Far easier to not use warts in the first place. Even if a wart is present, you still have to verify the variable's declaration anyway, if you're a diligent maintenance programmer.
  2002, Linonut, “Computer Science”, in comp.os.linux.advocacy (Usenet)