bleacher blister

An ass sore you get from luxury seating at your local high school football field or public ball park field, usually caused by long term sitting on metal or aluminum type seating.

Jimmy: Jesus Christ Mark, I've been sitting here for over 4 hours and this fucking game is still not over!

Dave: Yeah tell me about it, i'm going to have a softball size Bleacher Blister by this time tomorrow on my ass cheek!