rusty beartrap 

this is where a person clenchs someones face in their buttcheeks and then proceeds to excrete into their mouth.

awww i've just been rusty beartrapped.

rusty beartrap by Ben Warton May 10, 2008

Rusty Bear Trap

the act of sitting on the face of another and pressing their face into your bare ass while clenching, while doing so it is necesary to shit into their mouth... taco shit are preffered but any will do.

man...after eating taco johns i gave justin the worst rusty bear trap.

Rusty Bear Trap by M.A.C July 27, 2006

Rusty bear Trap

The female equivalent of tea bagging. This is when a woman sits on someone's face in celebration of a kill in online gaming.

Katherine added to that guys humiliation by giving him a rusty bear trap after she killed him.

Rusty bear Trap by Squishy6 September 18, 2015