1. Someone who is stupid or foolish. I wouldn't believe a word that comes out of that coconut head's mouth. Of course a coconut head like Bill would be pulling on a door marked "Push."
2. offensive slang A racial epithet typically directed at people of African or Polynesian descent. Primarily heard in US. "Coconut-head" is something my Samoan friend has been called before. It's a stupid thing to call someone, but it's still really insulting.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.