Simple past tense and past participle of overbreed.(verb)
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Use "overbred" in a sentence
"My 'overbred' creatures are a series of animals that bear the imagined results of domestication pushed to absurdity."
"Being a writer is like being one of those riskily overbred pedigreed dogs — a French bulldog, for instance — poorly suited for survival despite their very special attributes."
"Lucas and Fischer are fine economists, but they overbred."