phrase used to describe a man or woman on the prowl. May be for a mate, sexual encounter, endeavor, location, or other discernible goal. May be demonstrated with palm extended (edge forward) from the forehead, as a shark fin.
"There goes Brad, after that floozy. (he/she's got) a fin up!"
To leave someone, such as a waitperson, a $100 bill as tip for providing you with outstanding service. Usually given to sexy young cocktail waitresses by up and coming gentlemen to show off their wealth and stature.
Did you get the usual tip from the Sinatra table? Yeah, Frank duked a fin.
n. A theory, created by several residents of Boozemont, which states that every time a joke is killed, the loss of a man'svirginity is prolonged for another ten years.
"Don't worry, bro. As long as you're not a brown-nosing son of a bitch, you can't commence the A-Fine Theory."