at (someone's or something's) mercy

at (someone's or something's) mercy

Subject to the control or actions of a particular person or thing. When you're a minor, you're totally at your parents' mercy. When you travel by public transportation, you're always at the weather's mercy. Her fate is at the jury's mercy—it's their decision now.
See also: mercy
Farlex Dictionary of Idioms.
See also:
  • at the mercy of
  • at the mercy of (someone or something)
  • be at the mercy of (something)
  • So what if I do?
  • stand on (one's)/its own
  • Mr Right
  • be on a hiding to nothing
  • Miss Right
  • missus
  • ms