Reverse Blumpkin

When a man is receiving oral sex from a woman and is defecating at the same time(aka blumpkin). However while defecating the woman takes a hold of the fecal matter and forces it back up the anus, hence the term reverse.

In simple words, a woman is giving a blumpkin and shoves the shit back up the mans ass.

Lucas: Yo Emily, Ben said that Reverse Blumpkin lowkey hurt.

Emily: Yeah it was a surprise 😝