laugh your head off
US /læf jʊər hɛd ɔf/
UK /læf jʊər hɛd ɔf/
1.
to laugh very loudly and for a long time
:
•
The comedian was so funny, we were all laughing our heads off.
•
I told him a joke and he started to laugh his head off.
to laugh very loudly and for a long time