Anal Stamp 

When Someone Sits Open Cheekedly On an Object, and leaves a brown or star shaped ring when they get back on their feet. It is a very short version of a skid-mark.

"Dude I totally left an Anal Stamp on my girlfriends sheets."
"Gross Man!"

Anal Stamp by Crack_House October 25, 2009

Anal juice stamp 

When an animal plops it's leaking anus down on your floor, desk, kitchen table, or other surface you wish it hadn't (pretty much every surface) and leaves a slimy excretion from it's anal glands.

My cat pulled a Chester Cheetah style prank on me as it sat, stepped, and repeated all the way across my desk leaving an anal juice stamp at each "sit" interval.

Anal juice stamp by ShrewdSimian May 6, 2010