cuckoo


Concise Oxford English Dictionary © 2008 Oxford University Press:
cuckoo/ˈkʊkuː/
noun a grey or brown bird known for the far-carrying two-note call of the male and for the habit of laying its eggs in the nests of small songbirds. [Cuculus canorus.]

■ used in names of other birds of the same family (Cuculidae).

adjective informal crazy.
– phrases
cuckoo in the nest an unwelcome intruder in a situation.
– origin ME: from OFr. cucu, imitative of its call.
'cuckoo' also found in these Oxford entries:

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