- butthead (n.)
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[butthead 词源字典] - also butt-head, late 1980s, student slang, "objectionable person," from butt (n.1) + head (n.); perhaps influenced by butterhead, 1960s black slang for one who is a disgrace to the community. Earlier, butthead meant simply "the butt end, bottom" of anything (1630s).[butthead etymology, butthead origin, 英语词源]