What is the meaning of Cuckoo?

Any of various birds, of the family Cuculidae within the order Cuculiformes, famous for laying its eggs in the nests of other species; but especially a common cuckoo (Cuculus canorus), that has a characteristic two-note call.

The sound of that particular bird.

The bird-shaped figure found in cuckoo clocks.

The cuckoo clock itself.

A person who inveigles themselves into a place where they should not be (used especially in the phrase a cuckoo in the nest).

Someone who is crazy.

Alternative form of coo-coo (Barbadian food).

To make the call of a cuckoo.

To repeat something incessantly. (Can we add an example for this sense? )

To take over the home of a vulnerable person for the purposes of carrying out organized crime in a concealed way.

Crazy; not sane.

Source: wiktionary.org