со смеху

from laughing

→ с
phrase Rare #53,945
from laughing Often used in the expression «умереть со смеху» (“to die laughing”), meaning to laugh very hard. «Со смеха» is also used.
RU: Я чуть не упал со смеху.
EN: I almost fell over laughing.

Ты умрешь со смеху!

You'll die laughing!

— Ирония судьбы, или С легким паром! (1976)

Я чуть не умерла со смеху.

I almost died laughing.

— Вожделение (2007)