Etymology
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corkage (n.)

"the corking or uncorking of bottles," specifically in reference to a charge by hotel-keepers, etc., for serving wine and liquor not furnished by the house, 1838, from cork (v.) + -age.

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Definitions of corkage

corkage (n.)
a charge added at a restaurant for every bottle of wine served that was not bought on the premises;
From wordnet.princeton.edu