zoombie

(noun) : a type of fictional zombie; an undead person who possesses greater than average mobility compared to other, more traditional undead creatures; a zombie who runs and moves at a normal (or greater than normal) human speed. {best exemplified in the recent films Dawn of the Dead (2004) & 28 Days Later; from “zoom” + “zombie”}

"Dang, those zombies are fast."
"Those aren't zombies, man. Those are zoombies."