off (one's) dot

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off (one's) dot

Crazy; 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
References in periodicals archive ?
You probably thought the scriptwriters had forgotten all about Dotty's plot to bump off Dot, but they've finally remembered.
1= Boundless Prospect (16-1) (3.15 Redcar) Came from virtually last to first to score in the 1m claimer and was the third winner of the day to hit a high of 50 in running 4 Cherri Fosfate (12-1) (4.25 Redcar) Dug deep under David Allan to hold off Dot's Delight and Anything Once to the joy of those who backed him at 44.
Almost exactly three years ago, on May 30, 1997, Slater kicked off DOT's Garrett A.
(B) burning off dots of pigment from the fruit's outer skin.