wash and wank
To pleasure yourself in the shower. It's convenient because it kills two birds with one stone, the buckling down and the clean up.
Friend: Hey you wanna go to taco bell?
Me: Sorry, I gotta do the ol' wash and wank
Friend: Can I join?
Me: Yee
Me: Sorry, I gotta do the ol' wash and wank
Friend: Can I join?
Me: Yee