1) Cheating on one's significant other.
2) On top of a creepy person.
Don suspected his wife was on the creep with that crazy old bum that lived under the bridge. His suspicions were proven correct when he came home early from work one day to find the hobo's shopping cart parked outside and his wife in bed on the creep.
by Nick D July 13, 2004
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The one driver in line at a red light who feels the need to creep forward 6", causing everyone behind him- and many in the lane beside- to also creep forward 6". They are known then as "creep sheep".
I hate these creep creeps at every stop light. How much gasoline do they waste?
by ksmanning May 16, 2010
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A young, studly man with a particularly good butt (from excessive stair training). A particularly common jargon among young, female Dunkin Donuts employees.
I thought that creep was going to stay there for an hour.... *sigh of longing*
by TheAuthorityOnEverything March 17, 2018
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A word used, usually as an insult, on someone who's personality or overall behaviour is strange or weird.
Guy 1: That guy John is a damn creep...
Guy 2: I know, he acts like a child and he's nearly 23...
by fslfjsdklgjklgjioujdddamncreep November 03, 2010
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to stalk and check up on, without letting the person you are checking up on be aware of this.

to browse through someone's facebook and see their every action and others actions towards them.
That girl Kollene is such a facebook creep, she looks at my page every hour.
by pfrsh May 02, 2011
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