Word Origin & History
nuts (adj.)
"crazy," 1846, from earlier be nutts upon "be very fond of" (1785), which is possibly from nuts (n., pl.) "any source of pleasure" (1617), from nut (q.v.). Sense influenced probably by metaphoric application of nut to "head" (1846, e.g. to be off one's nut "be insane," 1860). Nut "crazy person, crank" is attested from 1903, (British form nutter first attested 1958). Connection with the slang "testicle" sense has tended to nudge it toward taboo. "On the N.B.C. network, it is forbidden to call any character a nut; you have to call him a screwball." ["New Yorker," Dec. 23, 1950] "Please eliminate the expression 'nuts to you' from Egbert's speech." [Request from the Hays Office regarding the script of "The Bank Dick," 1940] This desire for avoidance accounts for the euphemism nerts (c.1925). Nutty "crazy" is first attested 1898.