A name used for someone who acts as another persons sidekick, often attached onto their master like a leech. The idea of a goon slave comes from the glazing the master receives from the slave, or in other terms 'receiving their goon'
Ethan: "All John ever does is follow me around"
Devon: "Yeah cause he's your little goon slave"
A person who is the bitch of another person, acting as a sidekick but more submissive. In some cases, a Goon Slave will take the Goon of the master to their face
"Bro you're actually a fucking Goon Slave for Ethan"