Austerbate 

To thrust one's pelvis forward vigorously while in mid-conversation, but be unaware of it. (Air-hump)

-Hey, that guy's Austerbating!

Austerbate by Austin Hyslop December 3, 2003

Afterbate 

The akward moments after you masturbate and you clean up the jizz, put your clothes back on, think about how fucked up you are, etc...

Jack: "yo I just walked in on tom wiping his cock with tissues"
Tim: "ugh you saw him afterbate

Afterbate by M193 January 22, 2014

Assturbate 

To bring oneself to orgasm by various acts of anal-simulation.

Vanilla masturbation doesn't work for me anymore, now the only way I can cum is if I assturbate.

Assturbate by Tenshin_ April 7, 2016

musterbate

To sit idly and think.

"That is a lot of money. I will have to musterbate for a while before I make a descision."

musterbate by Shake Zula May 10, 2005

assterbater 

A one legged man whore who masturbates other men in their asshole's! And/or any man who uses another mans ass to masturbate.

Me: Hey John stop being an assterbater you gay fuck!:)

Kevin: No fuck that, I like it when he uses me to assterbate.

Me: YALL BETTER CALM DOWN WITH THAT SHIT!

assterbater by Jer and Ca$H February 28, 2008

Absterbate 

to exercise one's abdominal muscles excessively

Joe: "How was your work out?"

Bob: "Oh, man, I absterbated until I core-gasmed"

Absterbate by Adam Snider February 11, 2009

Assterbator 

Someone who frequently massages, plays with, grabs, pinches any part of their behind for self-pleasure

butt holer massager, Assterbator

Assterbator by Sasster2003 October 22, 2009