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1.
Similar to a "teabag" sexual position, only the stubag involves inserting your entire scrotal sac inside a person's asshole.
Man, Josh fucked that slut 7 ways from Sunday. I heard she actually took the teabag!
by SA Morris November 20, 2003
 
2.
Similar to being a douchebag, but is acceptable to say in public.
That guy sounds like such a douchebag!

No man, he's a Stubag!
by GWood October 11, 2005
 
3.
One with the ability to fall down flights of stairs whilst miraculously keeping their entire drink in it's vessel
Oh My God... He did another Stubags!
by Popsi February 10, 2010
 
4.
A sexual maneuver in which one man inserts his scrotum into another man's anus. Similar to the dipping motion of a tea bag in cup of hot water.
Last nights stubag left dookie crumbs all over my ass hair.
by Terrence Ramholt November 20, 2003