(Internet, abbreviation, alt-of, initialism, mildly, vulgar) Initialism of laughing my ass/arse off; used to indicate great amusement, usually exaggerated.
“LMAO. Cook him,” one said. “Grass needs to be touched,” another added. 2024 April 9, Connor Bennett, “Rockstar dev claps back at GTA 6 fans finding “mistakes” in trailer”, in Dexerto:
(Internet, mildly, vulgar) To laugh one's ass off.
Even if you don’t win, this slumber party quiz will have you LOL, ROFL, and LMAOing with your friends all the way into the night while you do everything you can to show them ALL that YOU are the ultimate Taylor Swift fan! 2014 September 12, Serenity Starr, “Introduction”, in Unofficial Taylor Swift Trivia Slumber Party Quiz Game! Who’s the Ultimate Fan?, Volumes 1–4 Super Pack, Houston, Tex.: Starr Ignition Systems, →ISBN, page 3:
Reading this website will have you ROFLing, LMAOing, and LOLing every time you read it. 2009 October 2, Jessica Hunter, Katherine Shamburger, “One Week at a Time: Jessica and Katherine’s Top 10”, in Todd Johnson, editor, The Conglomerate, volume 86, number 5, Shreveport, La.: Centenary College of Louisiana, →OCLC, page 12, column 4:
You’re girls. Whatever it is you want to kill each other over now, you’ll be LMAOing about on group chat in two hours. Trust me. 2017 September 12, Daniel José Older, chapter 20, in Shadowhouse Fall (Shadowshaper Cypher; 2), New York, N.Y.: Arthur A. Levine Books, →ISBN, page 244: