Definitions by Brookester

doof 

noun.

as in nerd, dingleberry, dummy; used to described someone in an affectionate but negative manner.

used in Northern California communities

Older brother: You are such a doof.

Younger sister: Am not. You're a doof.

Older brother: No you are.

Younger sister: No you are.

Also:
Dude, stop charging the line, ya big doof.

doof by Brookester July 11, 2005