Mississippi Riverboat

Much like the motorboat, except you take a runny shit on the woman's chest first. You then proceed to motorboat her, and every few seconds you lift your head up and yell "Mark Twain!"

Shari wanted me to give her a Cleveland Steamer, but I gave her an extra treat when when I gave her a Mississippi Riverboat instead!

by Crablouse April 21, 2009

Mississippi Riverboat

When you are fucking a girl doggie style and you put your thumb in her ass to steer the direction of the motion

She was pulling away so i had to mississippi riverboat her ass back on track

by humandumpster May 10, 2010

Upside down Riverboat

This is a sexual act that is similar to the "69". The female participant is on top and holds her arms straight while servicing the gentlemen on the bottom. The male holds the females feet in his hands and rotates the ladies feet in a circular motion to resemble the propeller on 1850's riverboats.

David Wilcox's "Riverboat Fantasy" must be playing for the entire duration of the Upside down Riverboat.

This sexual position was inspired Cowboy's and Alien's which features an upside down riverboat.

So then we Upside down Riverboated all night.

by Colonel Shvatz November 9, 2011

Riverbottom Bed Bug

It's a homeless person that jumps from one tent to the next sleeping with anything that drops their pants.

I hope that Riverbottom Bed Bug gets that STD taken care of before it spreads as fast as her legs did.

by Midnite Rider 83 April 11, 2023

alabama riverboat

a reverse pounding of a white person via multiple black people

my hot white supermodel wife really loves taking a ride on the Alabama riverboat

by afuk-king ejet August 7, 2023

riverboat

A MPV (multi purpose vehicle) that (unlike most of them) can actually cross muddy fields, ford every stream, climb every mountain etc.

Darrin's new Probe is a real riverboat but it has a shitty gearbox

by poodlewrestler August 30, 2005

Mississippi Riverboat

Akin to a Cleveland Steamer, the Mississippi Riverboat is accomplished by first getting the runs, then taking a liquid shit on the neck and chest of a woman, at which point the shit runs down her like a wide, muddy river

I had enchiladas for lunch, which turned the Cleveland Steamer I laid on her into a Mississippi Riverboat

by Milfadd July 26, 2011