Top Definition
1. The scientific study of matter in the anus, especially the positions, dimensions, distribution, motion, composition, energy, and evolution of anal bodies and phenomena.

2. Examination of the anus, usealy with a telescope.
After Anal Ella got pounded by a 14 inch cock, she had to go to a special doctor, who was very skilled at the art of asstronomy.

"My uncle Ted knows a lot about asstronomy, I'm sure he could tell you a lot about YOUR ANUS." said Jimmy, who was then promptly beat up.

After Robyn had an asstromomier preform asstronomy on her ass, he found 5 condoms, 3 pounds of seman, 2 pencils, and 1 toy robot.
by Bennett doctor in asstronomy February 01, 2006

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1. The scientific study of matter in the anus, especially the positions, dimensions, distribution, motion, composition, energy, and evolution of anus bodies and phenomena.

2. Examination of the anus, usealy with a telescope.
After Anal Ella got pounded by a 14 inch cock, she had to go to a special doctor, who was very skilled at the art of asstronomy.

"My uncle Ted knows a lot about asstronomy, I'm sure he could tell you a lot about YOU ANUS." said Jimmy, who was then promptly beat up.

After Robyn had an asstromomier preform asstronomy on her ass, he found 5 condoms, 3 pounds of seman, 2 pencils, and 1 toy robot.
by Benny doctor in asstronomy January 03, 2006

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