1.most commonly used in world of warcraft, a Gnome-toaster is a mage player on the horde that uses their fire abilties to "toast" gnomes on the alliance usually for the reason that if you are a gnome you deserve to die
2.it also could be used in the combonation of a lawn gnome and a common toaster used to make toast or toaste bagels which is just completly random
1. Jimmy: hey do you know if Brent plays world of warcraft?
Patrick: yeah hes a gnome-toaster.
2.Thomas: want to have a random contest?
Luis: yeah sure.
Thomas: you go first
Luis:Gnome-toaster I win you suck