BYOB fee

• A charge added at a restaurant for every bottle of wine served that was not bought on the premises
• Fancy restaurant fee

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM OTHER ENTRIES ▪ The restaurant doesn't have a corkage fee. EXAMPLES FROM CORPUS ▪ Bring your own booze; there's a 50p corkage charge.

WordNet Word definitions in WordNet
n. a charge added at a restaurant for every bottle of wine served that was not bought on the premises

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Corkage \Cork"age\ (-[asl]j), n. The charge made by innkeepers for drawing the cork and taking care of bottles of wine bought elsewhere by a guest.

Wiktionary Word definitions in Wiktionary
n. A fee charged by a restaurant to serve wine that the diner has provided, at a BYOB.