Bonus Sister 

Same relation as a stepsister, but with positive connotations as opposed to the negativity that is typically associated with a Stepfamily. Bonus family members are chosen freely and they enrich your life.

My mother remarried after I moved out of the house. I am a good friend with her new husband. As an added bonus, I was introduced to an awesome new awesome friend: my Bonus Sister.

Bonus Sister by DieDirk May 14, 2016

rage bolus 

The act of taking an aggressive correction dose of insulin after experiencing prolonged and frustrating high blood sugar. Often results in a hypoglycemic event.

"I was high for hours and the reasonable corerections weren't working so I just went all ARGHHHH and tapped in a big ol' rage bolus.

rage bolus by Zentaria December 23, 2018

bonus eruptus 

A rare disorder in which the skeleton tries to jump out of the mouth and leave the body.

"The only cure for bonus eruptus is transdental electromicide!"

bonus eruptus by ripelivejam August 19, 2009

BK bonus ring

The random onion ring sometimes included in your order of BK french fries. It's kinda cool and kinda repulsive at the same time. Apparently, two completely separate receptacles for the fried side items is too lofty a concept for the King.

Chris: "Check it out! I got a BK bonus ring in my fries when we went through the drive thru!"

Smitty: "Look! I got a BK bonus fry in my onion rings!"

James: "BK sucks. Let's go to Chipotle."

BK bonus ring by whiteboyDJ March 9, 2010

bonus anus 

1. Something given or paid in addition to what is usual or expected.

2. Something good, extra, free or unexpected.

Oprah - "You get a car! You get a car! EVERYBODY GETS A CAR!!"

Random audience member slash receiver of new awesome Oprah car - "BONUS ANUS!"

bonus anus by dirtydawgggggg November 8, 2010

bodussy 

the smell of booty, dick , and pussy

have there been hoes up in here 'cause it smells like bodussy

bodussy by big balla November 6, 2002

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.

I'll just clean out the fridge, haven't done that in a while... wait a sec what's this? BONUS BEER! Righteous!

bonus beer by Chef Dionysus September 12, 2008