raft ass

Raft Ass is a term used in whitewater sports, such as rafting and kayaking, to describe a particularly itchy and unsightly rash, usually located on the ass/buttocks, that afflicts those outdoor enthusiasts, but especially butthole surfers.

•1st year raft guide while dropping trow: “Yo dude, I took so many trips this week & never changed shorts, can you take a look at this?”
•Old school raft guide while examining rash: “Oh, that’s a total rookie mistake & a solid case of raft ass.”
•Butthole surfer kayaker: “Brutal, but nothing a little Budro’s butt paste won’t clear up.”