One person drinks a beer pitcher full of liquid laxatives. Then puts a tube up their rectum. The second person inserts the other end in thier rectum. The person that drinks the laxatives then defecates in the tube and in the other persons rectum. The other person then defecates its back into the other person.
My grandpa was born in Mississippi, and told me stories of when he aspired to perform a Mississippi Steam Boat with his best friend as a kid. He wound up becoming a captain of a Mississippi Steam Boat.
by MSRvrcpt June 12, 2022

When I was in Memphis last week I broke me off a piece of Mississippi fat back.
How was it man?
Greasy!
How was it man?
Greasy!
by Bully Schlitzkowski May 16, 2016

by Topper Sullivan December 21, 2008

an act which enlists a group of posh, pretentious twats, who, usually, know each other from the villages' local cricket teams. Said twats get naked, and all do a shit on a long peice of heavy duty plastic which is laid out down the length of one's garden. They then proceed to take turns in running up to and sliding down the plastic, which by now is covered in shit.
posh twat 1: "oh Mortimer, do join us for a Mississippi Mud Slide on Saturday after cricket."
posh twat 2 (who we now know as 'Mortimer'):"That'd be just splendid if I didn't have an infected bock boil. I'll come along for the chinwag though"
posh twat 2 (who we now know as 'Mortimer'):"That'd be just splendid if I didn't have an infected bock boil. I'll come along for the chinwag though"
by el kizzle May 2, 2009

When the male partner has diareha and shits in the female partners mouth. The the female opens her mouth and the male dips his nut sack in her mouth. Then slaps the female in the face with it. Leaving a mud like substance on her face. (Mississippi Mud Slap)
by Trey1234 June 22, 2011

When a fat chick shits herself while wearing a thong thus splitting the turd in half... thus the saw mill.
by bucsfan13 February 24, 2011

by jjk52 September 25, 2010
