n. pl. pa·chu·cos
1. A Mexican-American man or boy who dresses in flamboyant clothes, often one who belongs to a neighborhood gang.
2. Offensive A Mexican-American man or boy.
[American Spanish, person from El Paso, pachuco, possibly alteration of payuco, yokel, from Spanish payo, peasant, perhaps from Galician Payo, Pelagius (considered a typical peasant name).]
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