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English definition of “horse's ass”

horse's ass

noun [C usually singular]     /ˌhɔː.sɪzˈæs/ US  /ˌhɔːr-/ US offensive
a stupid and annoying person: You may think you're being funny, but everyone else thinks you're being a real horse's ass.Stupid and silly people
(Definition of horse's ass noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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