The act of vaginal or anal penetration with ones erect appendage, while simultaneously defecating ones bowels while sitting on a toilet.
Step one: Guy sits on toilet
Step two: Guy gets a boner
Step three: Chick sits on boner ( which hole; dealers choice )
Step four: Guy takes shit
Bonus points: Use her squirt as bidet
"Dude on my way home from work i stopped at Taco Bell and got a perfect gutter queen tonight."