Dictionary
Words, grammatical forms and meanings linked to the ontology.
off one's nut en · ADP
Pronunciation
Meanings
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(UK, dated, idiomatic, in US) Insane, crazy.
Old Smith was awfully bucked because he'd taken four wickets. I should think he'd go off his nut if he took eight ever.
1909, P. G. Wodehouse, chapter 17, in Mike: A Public School Story:"[I]f I was to spring this news in Mr. Wright's hearin', why, such a sensitive, high-tempered gentleman as he would go plumb off his nut."
1914, Zane Grey, chapter 13, in The Rustlers of Pecos County:"Look at them rapids ahead of us! Why, the guy that laid out this river was off his nut!"
1918, Rex Ellingwood Beach, chapter 11, in The Winds of Chance:
Synonyms
off one's rocker