Plural of 'gat,' which is slang for guns or firearms, or archaic plural of 'gate' meaning passages or openings.
As slang for guns, 'gat' comes from Gatling gun (named after inventor Richard Gatling). As an archaic plural, it derives from Old English 'geat' (opening or passage).
The term 'gats' for guns is a brilliant compression of history—taking the name of one of the first rapid-fire weapons and shortening it into cool slang that became famous in jazz and crime fiction.
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