Brownies that have been found and eaten off the ground.

The act of having a sexual partner defecate on your chest in a parking lot
"I'm so drunk right now, I would eat a ground brownie"

"The only way to show affection nowadays is a Ground Brownie"
by Fedora Fantastic February 18, 2010
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The dark areas on roadways found in dips or bumps in the road consisting mainly of drippings from oil or other fluids found in automobiles. These deposits are due to the jarring of the vehicle up and down shaking loose any grease, oil, or any nasty fluids discharged from a motor.
Take a left turn after you pass the big pan of Ground Brownies.
by RynoGyno March 3, 2010
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