free-fill

Getting a free refill at Starbucks without having stayed within the store to drink the paid-for drink or without purchasing the previous drink from the same location or on the same day.

“Let me quickly stop into Starbucks to get a free-fill before we head to the game.”

blocktail

reluctantly buying an alcoholic beverage at a bar for the friend or friends, often of the opposite sex, of a romantic interest

“I can’t believe I had to get that dude a $12 blocktail just to keep talking to that chick!”