Jackass
来自Big Physics
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wiktionary
From jack + ass
From the phonetic similarity of " jack, ace" to " jackass".
etymonline
jackass (n.)
"male ass," 1727, from jack (n.) + ass (n.1). Contemptuous meaning "stupid person" is attested by 1784 (Ignatius Sancho). Related: Jackassism (1837, American English); jackassery (1833).
