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.
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.