The crust left on the end of the eurthera after sex that makes pee go in several directions simultaneously.
"She got mad when I missed the toilet, but she calmed down when I told her I had a mustard plug."
by Helpful guy. April 11, 2014

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when a man fucks a women with a yeast infection, and then sticks his meat in her ass...and then it burns
johnny gave that nasty ho with a yeast infection a mustard plug
by dominick July 10, 2008

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The yellow, green or brown paste found on the end of ones penis after engaging in anal intercourse.
The sex was great last night, except I got a mustard plug.
by Misfit December 18, 2003

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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The act of tongueing the ass of a lover with diarrhea.
She admittedly ate Taco Bell before our date, and as it turned out, I gave her the ol' mustard plug the next morning.
by Joe Dugger May 04, 2005

The Urban Dictionary Mug

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Lotsa space for your liquids.

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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A small piece of hard (and sometimes crusty) shit that you push about before a big wave of diarrhoea.
That mustard plug was like a dam holding back a reservoir of shit, I just ruined my toilet.
by raunchycabbagebaby April 15, 2015

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt