Gone off their rocker - Idioms by The Free Dictionary
go off (one's) rocker (redirected from gone off their rocker)
go off (one's) rocker
To become crazy or mentally unsound; to become extremely foolish or foolhardy. I'm going to go off my rocker if I have to hear that blasted song once more! I think Jane's grandmother has gone off her rocker lately. You must have gone off your rocker if you think that's a good idea!
References in periodicals archive
Why else would so-called intelligent people even be discussing this absurdity called "same--sex marriage?" Have they gone off their rocker
? Or is there a method in their madness?
THEY may not be that trendy but at least our MPs showed yesterday they have not gone off their rockers
by naming Led Zeppelin's classic second LP as their favourite album.