'LOL'
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16 Times Urban Dictionary Defined Words Better Than The Oxford Dictionary

4. 'LOL'
"It's original definition was "Laughing out loud" (also written occasionally as "Lots of Laughs"), used as a brief acronym to denote great amusement in chat conversations. Now, it is overused to the point where nobody laughs out loud when they say it. In fact, they probably don't even give a sh*t about what you just wrote. More accurately, the acronym "lol" should be redefined as "Lack of laughter." Picture: Urban Dictionary