laugh your head off
US /læf jʊər hɛd ɔf/
UK /læf jʊər hɛd ɔf/

1.
mourir de rire, rire à gorge déployée
to laugh very loudly and for a long time
:
•
The comedian was so funny, we were all laughing our heads off.
Le comédien était si drôle, nous étions tous morts de rire.
•
I told him a joke and he started to laugh his head off.
Je lui ai raconté une blague et il a commencé à rire à gorge déployée.