The Collaborative International Dictionary
cuckoo's mate
Wryneck \Wry"neck\, n. (Med.)
A twisted or distorted neck; a deformity in which the neck is drawn to one side by a rigid contraction of one of the muscles of the neck; torticollis.
a person suffering from torticollis.
(Zo["o]l.) Any one of several species of Old World birds of the genus Jynx or subfamily Jynginae, allied to the woodpeckers; especially, the common European species ( Jynx torguilla); -- so called from its habit of turning the neck around in different directions. Called also cuckoo's mate, snakebird, summer bird, tonguebird, and writheneck.
Usage examples of "cuckoo's mate".
Yes, they call him the cuckoo's mate in these parts, and the cuckoo is here.