bonus beer

Beer which one "discovers" having not known that it was there. Typically this occurs after a party or family gathering/event and may often involve a secondary fridge or forgotten cooler. Discovery of said beer is usually followed by feelings of joy and well being, similar to finding unexpected money in a jacket one has not worn in some time.

the worst word ever, shitty beer, UF late night beer after the bars close (i guess)

When you're too drunk too remember exactly how many beers you have left, but you have 1 more than you thought.

A lost beer you find in the fridge.