What is Mississippi Steamboat?
1.
The act, while showering with your significant other, of laying an overwhelming fart and quickly exiting the shower; leaving your significant other trapped with the terrifying stink.
My wife wouldn't have sex with me in the shower, so I laid a Mississippi Steamboat on her to teach her a lesson.
She wasn't giving it up, so I dropped the old Mississippi Steamboat.
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2.
when you are fucking a girl doggy style, pull out right before you ejaculate, and catch then heat up and throw it on her face
dude i gave this bitch a mississippi steamboat last night and she liked it
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