A slang term for lol, as in:

Referring to women who are sexually or romantically attracted to other women. Applies to both lesbians and bisexual women, as it is only the same-sex attraction that matters, not any other attractions the women may have.

Originates from the Greek poet Sappho, a bisexual woman from the Isle of Lesbos, from which we get the term lesbian.

Basically you're 'laughing out loud', but then you remember you dropped your keys or the joke was actually a proposition.
Laugh
Out
Lou-FUCK!

Laugh Out Loud and Fart.

laughing out loud films!