mort de rire
Definition from Wiktionary, the free dictionary
- lit., as adjective or past tense, dead or died of laughing, so "died laughing" or "dying of laughter"; compare mort de faim for starve. Often appearing as abbreviation "mdr" or "MDR," e.g., in SMS, as the French expression equivalent to LOL; sometimes expanded as the infinitive, mourir de rire (see Larousse).
- Tout le monde était mort de rire après cette blague.