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1.
When you go to bed after taking a shit and over the course of the night, you scratch your asshole and you end up with shit on your finger.
"Hey last night I went Mississippi mud-thumping and I didn't even know it!"

by RE productions. October 12, 2008

Words related to mississippi mud-thumping

ass disgusting filth finger gross horrid mississippi mud nasty raunch shit stink thumping vile