Top Definition
Someone who has the brain of a pecker (a small bird);a punk kid who isn't smart.
Example A:Stop being a pecker brain and think before you do something stupid!

Example B: Your little brother is a pecker brain,he has the brain of a bird!

by maclean II August 15, 2007
a different form of the insult "peckerhead" which is similar to the word "dickhead." To call someone a peckerbrain would be to say that they are not very intelligent and its use sometimes denotes anger.
"Don't do that you fucking peckerbrain!"
by kyohaku August 06, 2008
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