1 definition by DerbraiN

Top Definition
Lacking common sense, a fool.
A: I burned my food by using the big flame stove thingy.
B: What a derbrain!
by DerbraiN January 10, 2008

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.