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The act of inserting mustard into a vagina or anus, then inserting a penis or large piece of meat into the vagina. The piece of meat could be a bratwurst, hot dog, or even a steak if you're feeling extra meaty.

It gets it's name from the creator, Michelle. I'm sure it would work well with anyone, although I hear it's better with a Michelle.
Male A: I'm in the mood for a hot dog. That sounds delicious.

Male B: I agree, although Michelle's Mustard Dog sounds even better. What is her phone number?

Male A: I have no idea. Besides, I'm more of a ketchup guy myself.
by TrollWarrior June 14, 2009
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Jul 25 Word of the Day
A jack off buddy (from 'cum' /'come', meaning 'semen', and 'companion'); a friend that you get together with for sessions of solo or mutual masturbation
Variant of: cumpanion (from 'companion' & 'cum'); jack off buddy & wank bud & JO buddy
Similar to: fuck buddy
My bf and I used to really get it on together, but now it's just the occasional cumpadre wank
by Gladys Pipps-Knightley May 14, 2007
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