The speculated sound made by the triceratops.
Coined and popularized by the webcomic "Laika & Qubit."
When asked if he would like a chimichanga Mr. Triceratops replied, "Gromp."
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To proceed to step on one's genitalia, usually on "accident"
Man: what the fuck are you doing?!?! That fucking hurts!!
Woman: I'm just gromp stomping you because you decided to eat my food.
2 men touching assholes together.
Hey man I heard that Gromping feels really nice.