Meaning

noun a man whose wife committed adultery

verb be sexually unfaithful to one's partner in marriage

originFrom Middle English cokolde, cokewold, cockewold, kukwald, kukeweld, from Old French cucuault; a compound of cucu (“cuckoo”) and Old French -auld. The word references the behavior of cuckoo birds where they lay their eggs in another bird’s nest. Cucu is either a directly derived onomatopoeic derivative of the cuckoo's call, or from Latin cucūlus. Latin cucūlus is a compound of onomatopoeic cucu…

Etymology from Wiktionary, CC BY-SA 3.0