Informal or slang term for legs, especially attractive legs.
Possibly from French 'gambe' or Italian 'gamba' (leg), or from the Greek-derived 'gamb-' relating to legs. It entered English slang in the 19th-20th centuries as informal vernacular.
This slang term became so popular in 1920s-50s American culture that pin-up magazines were literally described as showing 'gams'—it's a hilariously vague euphemism that everyone somehow understood!
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