be below the belt

be below the belt

To unfairly target another person's weakness or vulnerability. The phrase refers to boxing, in which hitting an opponent below the waist is unacceptable. I know she really wants the promotion, but telling the boss about my personal problems was below the belt.
See also: below, belt
Farlex Dictionary of Idioms.
See also:
  • below the belt, hit
  • hit (one) below the belt
  • hit below the belt
  • hit someone below the belt
  • below the belt
  • smell blood
  • scent blood
  • get (one) over a barrel
  • get someone over a barrel
  • pearly