Definitions by arsenio billingham

dejamnesia 

The phenomenon by which an individual becomes aware that this is not the first time they have forgotten the same piece of key information.

Arsenio Billingham: Dude, what is that's chick's name again, the one with the really fat head?
Gary Kasparov: Man, you asked me that last month.
Arsenio Billingham: Whoaa, I just got the biggest dejamnesia

dejamnesia by arsenio billingham June 3, 2010