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1. LMKO
Laughing-My-Keys-Off
When you laugh so hard that your keys fall off your computer.
Boy 1: So the other day she told me about her hookup with this ugly dude.
Boy 2: LMKO dude I cant type.
2. LMKO
Laughing my kada off
Joe: I just broke my kada

James: LMKO!!!!
3. lmko
its an abriviation of
Laugh My Kicks Off
"omg that was so funny im lmko!"
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