off (one's) dot

off (one's) dot

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