The introduction of one's digit into another's anus, especially durng sex, resulting in a brown finger/tip; caused by a torpedo in the tube, a turtle head ready to poke out.
Poop in the shute.
Dang!!! I was BDP'ing this chick, gave 'er a finger up the ass, and ran into a turd!!!
Dude, you got ET'd!!!That's AWESOME!!!!