(v.) Something is either a). very good, or b). very bad. Depending on your sexual orientation, I suppose, although straight people can use it either way. Heavily dependent on context.
"We have a physics test today."
"Dude, that stuffs the butt."

"Have you seen the Linux XGL demo on Google Video?"
"Yeah - that video really stuffs the butt!"

"Landon, you really know how to stuff the butt."
by cybertaur1 March 21, 2006
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Seth: Colby, your mohawk looks very nice.
Colby: I know, it stuffs the butt right?
by Landon Lichtman March 21, 2006
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