Abbreviation for "Laughing Out Loud In Real Life." It is used over the internet to express that you aren't just laughing on the internet, but in real life as well.

'laught out loud, in real life'

Since people type 'lol' at only slightly amusing things, that did not actually provoke genuine laughter, people now type 'lolirl' to signify that they genuinely laughed out loud, in real life. Nerds.

to laugh out loud in real life.

usually when people say lol they are not laughing irl, but when you say lol irl, you are laughing really in real life.