laugh out loud = lol

LOL (also written with some or all letters lowercase) is an abbreviation for laughing out loud^[1][2] or laugh out loud.^[3] LOL is a common element of Internet slang used historically on Usenet, but 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 such as ROTFL^[4][5][6][7] or ROFL ^[8] ("roll(ing) on the floor laughing"), a more emphatic expression of laughter, and BWL ("bursting with laughter"), above which there is "no greater compliment" according to technology columnist Larry Magid.^[9] Other unrelated expansions include the now mostly historical "lots of luck" or "lots of love" used in letter-writing.^[10]