off one's rocker

off (one's) rocker

Crazy; mentally unsound; extremely foolish. I'm going to go off my rocker if I have to hear that song one more time! I think Jane's grandmother is a little off her rocker these days. You must be off your rocker if you think that's a good idea!
See also: off, rocker
Farlex Dictionary of Idioms.

off one's rocker

Also, off one's nut or trolley . See off one's head.
See also: off, rocker
The American Heritage® Dictionary of Idioms by Christine Ammer.

off one's head, rocker, etc.

See go off one's head.
See also: off
The Dictionary of Clichés by Christine Ammer
See also:
  • off (one's) rocker
  • off one’s rocker
  • off rocker
  • off your rocker
  • off (one's) dot
  • rocker
  • (one) is off (one's) rocker
  • be off (one's) rocker
  • be off (one's) dot
  • go off (one's) rocker