do (someone) a bad turn

do (someone) a bad turn

To do something harmful or malicious to another person. The lawyer did us a bad turn in the end, charging us thousands of dollars while doing very little to actually settle the case.
See also: bad, turn
Farlex Dictionary of Idioms.
See also:
  • dine with the devil
  • sup with the devil
  • Trojan
  • Trojan horse
  • a Trojan horse
  • evil twin
  • get wise to (someone or something)
  • he who sups with the devil should have a long spoon
  • sup
  • speak/think ill of somebody