be skating on thin ice

Meaning

1. be skating / walking on thin ice

   to be taking a risk

From the same entry

• disappear, vanish, into thin air
• have a thin time
• out of thin air
• the thin end of the wedge
• thin on top
• a thin skin
• thick on the ground
• walk a fine line
• spread yourself too thin
• through thick and thin
• wear thin