The sexual act of acquiring an erect penis, and falling face-first, so that ones penis bursts out of the anus. The female then proceeds to straddle the now raw penis.
"Yo Chev, I just saw someone doing the reverse Thornton asshole dickfuck"

"Damn, he alright?"
by Jerome Momas December 24, 2013
mugGet the Reverse Thornton Asshole Dickfuck mug.