Definition
Dangerously, hazardously, delicately.
Origins
Suggesting a person skating or walking on a frozen-over body of water, at risk of breaking through and falling into the water.
See Also
How People Actually Use It
1.Literal meaning-on ice that is too thin to support one 2.AS USED IN SENTENCES- You're already in trouble, and can't afford another mistake. 3. Fig. in a risky situation. 4. in an uncertain condition Usage notes: often appears as skating or walking on thin ice (taking a big risk) :
"She was on thin ice when her mother saw her report card. You are taking a chance and doing something that could get you in trouble. its used to describe a person when making impulsive decisions which would have an adverse impact on him. This means that you are walking on unsafe ground and your about to get in trouble. It means that you should be careful with what you do. You are taking a chance and doing something that could get you in trouble. If you try that you'll really be on thin ice. That's too risky. If you don't want to find yourself on thin ice, you must be sure of your facts. My brother was already on thin ice with the coach when he injured his knee."
Source: Urban Dictionary