Meaning

noun a man who is a stupid incompetent fool

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

verb repeat monotonously, like a cuckoo repeats his call

originFrom Middle English cokkou, kokkow, cukkuk, gokkouȝ, probably from Old French cocu, coquu, cucu (whence French coucou); ultimately onomatopoeic of the song of the male Common Cuckoo (Cuculus canorus), perhaps via Latin cucūlus (“cuckoo”). Compare dialectal English gowkoo (“cuckoo”). Displaced Middle English gnokken (“cuckoo”) and native Middle English yeke, ȝek (from Old English ġēac (“cuckoo”)),…

Etymology from Wiktionary, CC BY-SA 3.0