use (one's) coconut(redirected from use their coconut)
use (one's) coconut
To use one's own intelligence and intellectual ability; to think logically and rationally. In this phrase, "coconut" refers to one's brain. Often said as an imperative. Come on, Dean, I know you can figure this out on your own. Use your coconut for a change! We'll have to really use our coconuts if we're going to have any hope of solving this supply issue.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.