To cross your fingers is to fold one over another for luck. Cross your fingers for me.
It is done for hope and also behind the back to cancel a promise, which are opposite uses. To cross your fingers is among the last superstitions that otherwise sceptical people keep.
1phrasecross your fingersTo fold one finger over another for luck.
“Cross your fingers and hope the results come today.”
cross your fingers is a gesture.
Practised in Body Language & Gestures