Top Definition
Person who constantly falls asleep. Cannot stay awake more than a few hours, often sleeps for days/weeks at a time. Only wakes up to eat and moan. Sometimes due to alcohol but more common cause is just being a KO King
Look at him asleep over there, such a KO King

There Carl goes again, sleeping as usual! He's the KO King

The KO King just woke up
by The Mal May 12, 2013

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