To have a friend suspend a male cadaver over your face, with their testicles resting on your eye sockets, while a friend squeezes/punches the body's abdomen, releasing anal mung into your awaiting mouth.
wow! billy and peter transylvanian teabagged my uncle in the park last tuesday.
It could be also a used Tampon
Uncle Dracula picked up some used Tampons at the ladie's toilet to make his cup of tea, he called it a transylvanian teabag.
One "spooky" or "goth" person placing testicles upon the face or within the mouth of another person.
"Man, I'm totally gonna give that girl a Transylvanian Teabag after the Bauhaus Concert."