When a person takes a shit and wiping is unnecessary(no shit present on toilet paper). Upon the completion of this the person must stand up and yell, BONUS!
When Chris found out he didn't have to wipe his shit, he stood up and proclaimed to the world, BONUS!
When meeting the opposite sex and ya'll attracted to each other, eventually sex will happen but normally not oral sex. So when you get some head it's considered or called a " Bonus"
A questionable Canadian game where one person would yell bonus and place both hands flat together and shove the finger tips into another’s unsuspecting anus.
Funny as shit if its not you on the recieving or giving end.