nut·hatch (nŭt'hāch') n. Any of several small, short-tailed birds of the family Sittidae, having a long sharp bill and known for climbing down trees headfirst. Also called nutcracker.
[Middle English notehache : note, nut; see nut + hache, hatchet (from Old French, perhaps of Germanic origin, from its habit of wedging nuts in bark and hacking them open).]
n. an insane asylum. : The teacher spent three years in the nuthouse. , When did you get out of the nut factory?
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
nuthatch
c.1340, probably is so called from its habit of breaking open and eating nuts; from nut + second element related to hack (v.) and hatchet.