cuckoo
noun
[ ˈkʊkuː ]
• a long-tailed, medium-sized bird, typically with a grey or brown back and barred or pale underparts. Many cuckoos lay their eggs in the nests of small songbirds.
• a mad person.
cuckoo
adjective
• mad; crazy.
• "people think you're cuckoo"
cuckoo
verb
• take over (the home of a vulnerable person) in order to establish a base for illegal drug dealing in the area.
• "the frightened woman confided to her support worker that her flat had been cuckooed by a gang selling drugs"
Origin:
Middle English: from Old French cucu, imitative of its call.