A phrase used to describe a person who should not be underestimated. A practical term which can be used with most anyone in any situation where the individuals abilities, conduct or intelligence might be underestimated.
I know the Kobe and the Lakers have won nine games in a row, but Manu Ginobili is a Laker killer. Don't sleep on Manu Ginobili!
by Tom_in_SA March 2, 2009
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don't doubt me. don't think i'm not 'bout it.
i may be small but don't sleep you'll be suprised at what i can do
by Tazmanian devil May 22, 2006
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Don't underestimate me (by worrying)
I'll call you as soon as I get there, don't sleep
by blue December 1, 2003
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