LOL, an acronym for laughing out loud or laugh out loud, is a common element of Internet slang. It was used historically on Usenet but is now widespread in other forms of computer-mediated communication, and even face-to-face communication. It is one of many initialisms for expressing bodily reactions, in particular laughter, as text, including initialisms for more emphatic expressions of laughter such as LMAO ("laugh my ass off"), and ROTFL or ROFL ("roll on the floor laughing").
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Facebook's secretly working on LOL -- a meme hub meant to lure teens from Snapchat, Instagram, and TikTok
Facebook hasn’t given up on attracting teens. After numerous failed products aimed at teens — including LOL, Facebook ...