A fork of Rural Dictionary
The act of motorboating the anus.
Chuck's mouth smelled like poop after giving a girl the mud river motorboat
When you have diarrhea and you shit down a girls boobs and it runs down to her puss and you eat her out
I gotta make sure I eat Taco Bell before I give my girl a Mississippi mud river
When you take a shit in which there are no floaters. Every turd settles to the bottom of the toilet bowl like River Mud.
Last night after I ate a burrito I left some river mud in the toilet.
Joey left some river mud for his mom to find after he ate a triple bacon, triple cheese burger.