Bikers Butt 

Bikers Butt occurs when one is riding a bicycle in the rain. The back wheel shoots water straight up into the ass region of the biker, causing a soggy, U-shaped wet spot on the seat of the bikers pants. This causes major discomfort when sitting in class or interacting with other individuals in a social setting.

"Dude, why is your butt so wet?"
"Well, I had to get to class fast, so I rode my bike. Unfortunately, it was raining and I got a mad case of Bikers Butt. I had to sit on my wet ass for a 2 hour lab. It fucking sucked!!"

Bikers Butt by zbear25 September 10, 2011

bikers butt 

bikers butt is the overuse of your butt muscles and joints caused (in the majority) of excessive biking

like tennis elbow and/or golfers elbow, bikers butt is a result of an over exertion of a given muscular area

bikers butt by Hsquarded September 27, 2009

bikerbutt 

Bikerbutt is a medical condition in which the gluteus maximus deteriorates from many years of hard poundings and rides on the road common amongst bikers and bicyclist

If you ride your bike for too long you will be sure to get a case of bikerbutt did you see how flat her butt was she must ride a lot on her bike

bikerbutt by Jt1987dyt May 13, 2016