Laughter die me

It's a very incredibly stupid play on the Chinese term 笑死我了which means something is so funny that you are dying of laughter. (Similar to lmao)
Alternative usage is in a sarcastic manner when a joke isn't funny at all.

Person 1 (over text): Have you heard of the movie constipation? It never came out!
Person 2 (over text): Laughter die me