look up any word, like blumpkin:
 
1.
An expression of anguish when one "screws up" or a mistake of great proportions.
Sam: Dude, that's not the answer...
Alec: I DUNGOOFED!
by velvety1967 March 28, 2011
 
2.
What happens when a preteen girl uses the internet.
Jessi Slaughter dun' goofed again?
by yomommascouchagain January 11, 2011