(US, baseball) A baseball cap worn inside-out and backwards, or in another unconventional manner, by players or fans, as a talisman in order to will a team into a come-from-behind rally late in the game.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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