A stupid person. Did you see the guy who's wearing two different shoes? What a banana-head.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a stupid person. (Usually objectionable.) Ask that banana-head why she is wearing a coat like that in July.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.