Definition

Acronym for 'laughing my ass off'; an expression of finding something extremely funny or amusing, often used hyperbolically online regardless of actual laughter.

Example Usage

lmao that meme had me dying, I couldn't breathe.

Origin

Emerged in early internet culture and online messaging in the 1990s as part of common acronym-based expression.

Fun Fact

LMAO remains one of the most universally recognized internet acronyms and is used so frequently that many people deploy it even in formal or neutral contexts.

Source: Definition backfill (hailey)