1 definition by Bozo105721

Top Definition
Part 1: Waking up hungover, rolling over and locking eyes with a fatty, and realizing that you got too drunk and had sex with a cow.
Part 2: Upon further speculation, you realize that this fatty is no ordinary fatty.
Realization: You have had drunk sex with this particular fat chick before.
Deja Moo.
Rich: Dude, I still can't believe you banged that fat chick Carla last week.
John: Yea, well I had a Deja Moo with her last night.
by Bozo105721 October 29, 2008

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