Top Definition
The process of destroying someone's asshole so completely that afterward a terraforming process can take place to make the ass capable of sustaining life.
I forgot to get my viking wife a valentines day gift, so she proceeded in Asshole Terraforming so brutally that half of our livestock now live there, complete with a chemically stable atmosphere.
by Placentoid April 30, 2013

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt