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The act of having sex in the backseat of a car and having a friend drive down a Michigan road hitting as many potholes as possible
Lisa and I did the Michigan Jackhammer yesterday john drove...
by Detroit_Dinkleberg January 30, 2017
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Jun 21 Word of the Day
A person with an outwardly dominant, masculine, or aggressive personality, but who also enthusiastically takes on the submissive or "bottom" role in the bedroom.
"I'm tough, Mike! I never give an inch! I'm partial to taking a few though..."
"Ah, you're a real pipehitter."
by Skeletalchemy June 15, 2021
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