lasterbating 

Masterbating so much that your dick falls off and that is your last time masterbating because your dick fell off

Jim: hey what were you doing last night?
Me: I was lasterbating.
Jim: Dude, your dick fell off?
Me: Yep.

lasterbating by Vagina McNuggets September 23, 2012

rasterbating 

Resizing an image larger to fit on many pages. These are then printed out and placed side by side to recreate a large poster of the original image. Usually the image is also modified to be made up of small dots, similar to old comics.

"That poster is huge, it must have cost you hundreds."
"No, Wendy taught me about rasterbating, it only ended up costing like $10."

rasterbating by Chris DeHaan May 20, 2008

plasterbating 

The act of masturbating after a night (or day) of severe drinking.

dude a: Got so wasted last night, went back to my place, got to plasterbating promptly.

dude b: Did your girlfriend watch again?

plasterbating by hammerbeard September 13, 2011

laxterbating 

the act of laxing so dirtily that you achieve physical pleasure

bro #1: dude that was a gnar rip!
bro #2 i know i was laxterbating

laxterbating by lax4eva October 4, 2010

Fasterbating 

The art of masterbating really fast and cumming within a 2 minute range is called Fasterbating

David: Well, my mom was coming home soon, but I was majorly horny... so I started Fasterbating.

Jim Bob: And...

David: 1 minute 30 seconds

Jim Bob: Nice

Fasterbating by Chaz E. February 28, 2008

lasterbation

1. Being the last person to perform in the act of masterbation amongst a group of others. 2. Last minute masterbation. 3. Last time masterbating in one's life. 4. Name of scale to determine how long one is capable of masterbating.

Tom likes watching others pleasure themselves before he sneaks in some lasterbation. Fasterbation

lasterbation by CorpseSaladTime July 29, 2014

masterbating with a cheese grater 

Doing a task that is not a good idea

Moving this piano without help is like masterbating with a cheese grater.

masterbating with a cheese grater by matt1975 September 10, 2012