The difference between Barmy and Nutty as a fruitcake
When used as adjectives, barmy means containing barm, i.e. froth from fermented yeast, whereas nutty as a fruitcake means behaving in an eccentric, foolish, or kooky manner.
check bellow for the other definitions of Barmy and Nutty as a fruitcake
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Barmy as an adjective (rare):
Containing barm, i.e. froth from fermented yeast.
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Barmy as an adjective (chiefly, British):
Odd, strange, or crazy.
Examples:
"synonyms: dotty goofy wacko"
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Nutty as a fruitcake as an adjective (simile, colloquial):
Behaving in an eccentric, foolish, or kooky manner; very nutty.