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
Erastos	-	Biblical Greek, Ancient Greek
ÉLodie	e-lo-DEE	French
Rebecca	[ri'bekə]
WisŁAwa	vee-SWAH-vah	Polish
Barry	['bæri]
Marcel	mar-SEL (French), MAHR-tsel (Polish), MAHR-sel (Dutch, German)	French, Catalan, Romanian, Polish, Czech, Slovak, Dutch, German