Top Definition
Fucking someone you've fucked before, but don't remember fucking.
I think I had a dejafuck last night.
by Cyber Kong October 06, 2005
:from sex and the city. When midfuck you realize you have done this person before
I had a dejafuck last night...
by Cathy.com.gr March 09, 2009
being intimate with someone who you were intimate with in the past
last night i had dejafuck with johnny
by **j*enna** April 26, 2004

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