Crazy as can be; extremely eccentric: ”That’s me,” Calazo said. ”Nutty as a fruitcake” (1935+)
Crazy, idiotic, as in Mary’s nutty as a fruitcake if she thinks she can get away with that. The adjective nutty meaning “insane” was first recorded in 1821; the similarity to fruitcake, which literally contains nuts as well as fruit, was first recorded in 1935.
- Nut up
verb phrase To go crazy; go ape: He’ll just about nut up when you tell him that (1970s+ College students)
noun 1. any of several snout beetles of the genus Balaninus, the larvae of which live in and feed on nuts and acorns.
[nuht-woo d] /ˈnʌtˌwʊd/ noun 1. any of various nutbearing trees, as the hickory or walnut. 2. the of such a tree. /ˈnʌtˌwʊd/ noun 1. any of various nut-bearing trees, such as walnut 2. the wood of any of these trees
[noo k] /nʊk/ noun 1. a city in and the capital of Greenland, in the SW part. /nuːk/ noun 1. the capital of Greenland, in the southwest: the oldest Danish settlement in Greenland, founded in 1721. Pop: 14 350 (2004 est) Danish name (official name until 1979) Godthaab