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cuckoo

1 cuckoo /ˈkuːku/ Brit /ˈkʊku/ noun
plural cuckoos
1 cuckoo
/ˈkuːku/ Brit /ˈkʊku/
noun
plural cuckoos
Britannica Dictionary definition of CUCKOO
[count]
: a type of bird that lays its eggs in the nests of other birds and that has a call that sounds like its name
2 cuckoo /ˈkuːku/ Brit /ˈkʊku/ adjective
2 cuckoo
/ˈkuːku/ Brit /ˈkʊku/
adjective
Britannica Dictionary definition of CUCKOO
[more cuckoo; most cuckoo] informal + old-fashioned
: silly or crazy
: very enthusiastic