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The tangy yellow spread secreted from the anus during copulation - often used as a spread on chicken sandwiches.
Man, gimme some more of that butt mustard yo, my sandwich is dry.
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The pasty by product of a long days work, and a bad wipe job after a long night of drinking beer and eating too many hotdogs.
Hey, look at the back of your pants, looks like you have a bit of Butt Mustard there.
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A fart that seeps out a little bit of liquid. Similar to a shart, but much less solid. Usually occurs after a heavy night of drinking.
When I farted, I thought it was okay, but then I felt the butt mustard squishing between my cheeks.
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The mix off blood, cum and shit that is often created during anal sex. It's dirty brownish yellow color and thick, soupy consistency resembles Dijon mustard.
How am I ever going to get that Butt Mustard off of my sheets before my girlfriend gets home?!?!?!
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Another way to describe the shit that comes out of a baby, it gets it's name from the color and consistency
You have to change little Johnny this time, I had to deal with his butt mustard last time!
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The watery sound ketchup/mustard makes when squeezed from a bottle.
Wow, Mike, that really sounded like a fart. No, dude, it was butt mustard. I was putting ketchup on my burger.
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