Also a fat ugly girl that is cranky and thinks she is smokin hot.
Most of the time, a bowser is the disgusting obese friend(girl) that tags along with a mega-hottie.
Man 2: "Ya man but look at her friend. If you get with that Dime, that means im stuck with the bowser!"
The next morning...
Man 2: "Fuck mann! You owe me BIG TIME!!!