be on thin ice

be (skating/walking) on thin ice

to be taking a big risk They knew that by publishing the article they were skating on thin ice.

Name	Pronounced	Usage
Davy	DAY-vee	English
Regulus	-	Ancient Roman
Rehoboam	-	Biblical
Berny	BUR-nee	English
Ayr	[ɛə]
Clay	KLAY	English