Backsturbating 

Rubbing your back against something to stop an itch.

Attendees of the meeting found Joe's backsturbating distracting.

Backsturbating by IDtenT September 12, 2014

Backsturbating 

When you itch your back with a backscratcher and moaning

"I find it really disturbing when my dad starts backsturbating in front of me in the living room."

Backsturbating by ThatIdiot June 15, 2018

hacksturbating 

When one member of the hacky sack circle moves outside the circle and begins showboating with the hacky sack by him or herself.

Great, there goes Joel hacksturbating again.
Allright guys, let's go find a new hacky sack.

hacksturbating by chief_lights June 3, 2011

Bathsturbating 

The act of masturbating while in the bathtub.

"Dude, did you see that video that was leaked of Brittney Spears bathsturbating?"
"Yeah, dude, that was revolting!"

Bathsturbating by Thatonedefiniitionguy November 27, 2016

batsturbating 

1.) The act of masturbating while hanging upside down. Ideally batsturbating is performed in a dark basement or cellar. Often batsturbating is accompanied by clicks used for the purpose of echolocation.

2.) The word used when one is binge watching the Christopher Nolan Batman movies.

"Have you tried batsturbating? It's a real headrush."

"I'd watch the new DC comics Batman movies starring Ben Affleck, but I'm going to be busy batsturbating."

batsturbating by [e-mail] February 18, 2018