Top Definition
To involuntarily stay sleeping longer than planned.
person 1,"How come you only just got up? It's like, 2pm."

person 2,"I must've overslept."

person 1,"Over sleep, is that even real?"
by LouMoo June 11, 2011
1 more definition
1)The act of men crashing at a friend's house.

2)The male version of a sleep over
1)Hey guys, you wanna oversleep!?

2) OVERSLEEP IS OVER!!!

by Revopeels April 17, 2009

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