Doc Brownin' it

A person who goes out to a club or bar only buys one drink and nurses it the entire evening. origin is from Dr. Emitt Brown of Hill valley 1885. Would buy whiskey and hold it the entire night. Two known occasions of consuming such beverage, the 4th of july and the morning of going back to 1985

Corey: So your gunna drink tonight??
Bruno: na i usually just buy one drink and drink it the whole time.
Corey: like doc did in back to the future???
Bruno: yeah im gunna be Doc Brownin' it