Etymology
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sportswear (n.)

also sports-wear, 1912, from sports (n.) + wear (n.). Hence sports coat, sports shirt, etc.

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chav (n.)

"antisocial youth," British slang, by 2004, apparently from earlier charver "loutish young person wearing designer-style sportswear," Northern British slang (1997) of uncertain origin. Earlier it was a verb in homosexual slang for "have sex." Perhaps ultimately from Romany (Gypsy).

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