Rastabating 

When a rastafarian masturbates

I walked in on Weed Man Winston only to find him "rastabating"

Rastabating by joshmiller November 22, 2013

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

Rastabation 

Smoking the weed before partaking in the act of self abuse!

Jonny Boy Blades got so perv'd up at work he picked up an eighth and rushed off home for a spot of rastabation

Rastabation by Itchy Trigger Fingers January 29, 2009

Rasturbating 

The process in which several sheets of paper (Each a different part of one picture) Are printed out, and then assembled to form a whole picture. Similar to puzzle making.

Guy1:Hey dude, what'ya doing?

Guy2:Just Rasturbating.

Guy1:Making a megaman poster I see.

Guy2:It's gonna look awesome when I put together all of the separate pieces.

Rasturbating by 60jack500000 January 19, 2012