Best definition
In games the Zspanky is the ultimate winner of the battle, which can be versus 1 or more players. You are the Zspanky if you win very easily.
After killing those other players with a single blow, I really am the Zspanky.
Zspanky: define #2
A huge load of diarrhea.
After eating cheese fries, pork, and corn, I let loose a zspanky.