(as) useful as tits on a bull

(as) useful as tits on a bull

vulgar slang Utterly ineffectual, worthless, or unnecessary. Primarily heard in Australia. Hey, thanks for the broken wrench—it's as useful as tits on a bull. I know next to nothing about computers, so I'd be useful as tits on a bull trying to figure out what's wrong with your laptop.
See also: bull, on, tit, useful
Farlex Dictionary of Idioms.
See also:
  • (as) useless as tits on a bull
  • (as) worthless as tits on a boar (hog)
  • (as) useless as an ashtray on a motorbike
  • useless
  • tits on a boar hog
  • (as) useless as tits on a nun
  • nun
  • (as) useless as tits on a boar hog
  • get on (one's) tits
  • get on someone's tits