Heads; so called from their resemblance to nuts. Probably
“crack,” applied to heads, is part of the same figure of speech.
To go off their nuts about ladies,
As dies for young fellars as fights.
Sims: Dagonet Ballads (Polly).
It is time to lay our nuts aside (Latin, Relinquere nuces). To
leave off our follies, to relinquish boyish pursuits. The allusion is
to an old Roman marriage ceremony, in which the bridegroom, as he led
his bride home, scattered nuts to the crowd, as if to symbolise to them
that he gave up his boyish sports.
That's nuts to him.
A great pleasure, a fine treat. Nuts, among the Romans, made a
standing dish at dessert; they were also common toys for children;
hence, to put away childish things is, in Latin, to put your nuts away.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
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