(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."
Something that is slightly awesome
Seth: Colby, your mohawk looks very nice.
Colby: I know, it stuffs the butt right?
Any sexual act involving da butt
Mark asked me if I wanted to do some butt stuff, so I let him stick his fingers (and his penis) up my butt. It felt really good.
A more SFW meaning for “Anal sex”
“Hey Gehab, I heard you like the butt stuff”
“Yeah dude, keeping it SFW”
A man has butt sex with a female or gives the booty more attention during sex
So you down to do butt stuff??
She love me doin butt stuff!
Butt stuff is for those kinky ass mofo's(