go off (one's) dot

To become crazy or mentally unsound; to become extremely foolish or foolhardy. I'm going to go off my dot if I have to hear that blasted song once more! I think Jane's grandmother has gone off her dot lately. You must have gone off your dot if you think that's a good idea!

Common Names:

Name	Pronounced	Usage
Jehoshaphat	ji-HAHSH-ə-fat (English), jee-HAHSH-ə-fat (English)	Biblical
Alston	['ɔ:lstən]
Winfred	WIN-frid	English
Beornr&Aelig;D	-	Anglo-Saxon
Allanson	['ælənsn]
Henrik	HEN-rik (Swedish, Norwegian, Danish, German)	Swedish, Norwegian, Danish, German, Hungarian, Slovene, Croatian, Armenian