A piece of feces; or an insulting term for an unpleasant person.
From Old English 'tord' and Proto-Germanic 'turdaz.' Likely imitative in origin, related to the sound of defecation. The word has been crude slang for over 1,000 years in Germanic languages.
This is one of the oldest insults in English—Medieval knights literally called their enemies turds, making it one of the few insults that survived from Anglo-Saxon times into modern slang. It's remarkably consistent: gross then, gross now.
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