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1 definition by Chinju

 
1.
dep
As a noun: the act of staying awake long into the night, well beyond the hours one's body is adapted to.

As a verb: to undertake such an action.

(From sleep deprivation; see also self-deprecation, depression)
"Wow, why's Mary look so out of it?"

"Oh, Mary depped all night studying for her biology final. Also, she's a crack addict."
by Chinju April 08, 2003