not have all (one's) buttons(redirected from not have all his buttons)
not have all (one's) buttons
To be crazy or unstable. Stay away from the corner house, kids—the old man who lives there doesn't have all his buttons. After yet another sleepless night, I'm starting to feel like I don't have all my buttons.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.