on thin ice

ice definition

1. n.
   diamonds; jewels. (Underworld.) : That old dame has tons of ice in her hotel room.
2. n.
   cocaine; crystalline cocaine. (Drugs.) : Max deals mostly in ice but can get you almost anything.
3. tv.
   to kill someone; to kill an informer. (Underworld. See also chill.) : Mr. Big ordered Sam to ice you-know-who.
4. tv.
   to ignore someone. (Underworld. See also chill.) : Bart iced Sam for obvious reasons.
5. tv.
   to embarrass someone; to make someone look foolish. : Don't ice me in front of my friends.
6. n.
   money given as a bribe, especially to the police. (Underworld.) : A lot of those cops take ice.
7. mod.
   excellent; very cool. : Her answer was ice, and she really put down that guy.