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

1.
sich totlachen, sich kaputtlachen
to laugh very loudly and for a long time
:
•
The comedian was so funny, we were all laughing our heads off.
Der Komiker war so lustig, wir haben uns alle totgelacht.
•
I told him a joke and he started to laugh his head off.
Ich erzählte ihm einen Witz und er fing an, sich kaputtzulachen.