need (one's) head tested(redirected from needed their heads tested)
need (one's) head tested
To do, say, or believe something that seems completely crazy, delusional, or stupid. You need your head tested if you don't think giant corporations are in control of our legislators! You spent $400 on a T-shirt? You need your head tested.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.