be (walking) on thin ice

be (walking) on thin ice

To be doing something very risky or dangerous that could result in imminent disaster or ruin. I hope you realize that you'll be on thin ice if you decide to gamble your employees' retirement funds on such a dodgy investment. You're walking on thin ice by continuing to come in late. If the boss notices, you'll be fired.
See also: ice, on, thin
Farlex Dictionary of Idioms.
See also:
  • be skating on thin ice
  • be skating/walking on thin ice
  • it is all up with
  • it is all up with (someone or something)
  • ask not for whom the bell tolls, it tolls for (someone or something)
  • toll
  • keep the wolf from the door
  • keep the wolf from the door, to
  • blow something
  • play Old Harry with (something)