Plural of chichi; either breasts (vulgar slang) or a variant spelling of chichis as a decorative or frivolous object.
From Spanish chichi (trinket, ornament) or French origins; the noun can mean a small dog or a showy decoration, with the body-part meaning being a vulgar extension.
Chichi perfectly demonstrates semantic drift—it started meaning 'showy trinket,' evolved into slang for small decorative dogs, and later picked up vulgar anatomical meanings in different English-speaking regions.
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