The Wizarding world's equivalent of white trash. Wizard Trash refers to any group of low class, poor, and generally inbred pure-blood wizards who live in the slummy outskirts of Muggle societies.
Cecilia: My God, what an eyesore! Can't your father have those people evicted, Tom?
Tom Riddle Sr: That shack isn't ours. It belongs to a Wizard Trash family named the Gaunts. Don't look at them, Cecilia, darling.
by Drewnina March 29, 2009