Removing such a large amount of excrement from your bowels that it leaves a void, like the forced evacuation whites from the inner city (or injuns from their land, or jews from poland).
Richard: "So, what happened to the Becky girl you saw last night"
Chad: "Well, she was a 6/10, I've seen better, so I had to Ejaculate and Evacuate. I think I may have even left my pack of gum there"
By Ofella
Vindaloo Evacuation
When you have a roaringhot diarrhea of fire the day after having consumed very spicy foods, such as a Vindaloo curry. This usually happens first thing in the morning, mere minutes after you wake up, and it stings even worse going out than it did coming in.
Man, last nightscurry was friggin' delicious, but it resulted in a painful Vindaloo evacuation early this morning.