"cuckoo" in the noun sense

1. fathead, goof, goofball, bozo, jackass, goose, cuckoo, twat, zany

a man who is a stupid incompetent fool

2. cuckoo

any of numerous European and North American birds having pointed wings and a long tail

"cuckoo" in the verb sense

1. cuckoo

repeat monotonously, like a cuckoo repeats his call

Source: WordNet® (An amazing lexical database of English)

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