Definitions by S.Mx.

dunch 

1. (noun) High class white trash, the most classy of a group of trashy white people.

2. (adjective) White trash attempting (and often failing) to be high class.

When referring to a place or event: "That's so dunch"
When referring to a white trash person who exhibits the qualities of white trash attempting to be fancy, "Stephanie was pretty dunch last night."

dunch by S.Mx. April 17, 2007