Acronym, standing for the imperative phrase "Queer off, Prune." Used like "Fuck off."
Could also be used in lieu of an Out Of Order or similar sign.
Middle-aged woman: "Is this the where the line starts?"
You: "Queer off, prune." (Or QOP).
Significant Other: "Do you want to go to Village Inn tonight?"
A term used to express superiority over ones enemy.
qop qop qop qop qop qop.