noun

cuckoo

cuckoo, fool

We heard a cuckoo in the woods.

We heard a cuckoo in the woods.

He's a bit of a cuckoo.

He's a bit of a cuckoo.

((a/the)) cuckoo (a type of bird) We heard a cuckoo in the woods.

((a)) cuckoo (a foolish or crazy person, informal) He's a bit of a cuckoo.

Synonyms (for a person): fool, eccentric, nutcase (informal)

Onomatopoeic, from the bird's call 'coo-coo'.

The word sounds like the bird's call. The term for a crazy person comes from the bird's strange nesting habits (laying eggs in other birds' nests).

This page is designed for learning support. Please use it as a learning reference, not as a formal reference.