"Zombie Goons" are Goons encountered in The Zoul Train and Lick the Toad.
Appearance
The magic of the Comet has zombified many of Zorrscha's Goons beyond recognition upon their arrival in its core (they even lack their characteristic bulbous nose). Avoid direct contact with them anywhere other than their heads as touching them head-on is near fatal; that is, get hit by them and your health will go all the way down to 1 hit point.
Notes
(Note: The name in this article is purely conjectural, based on description alone)