When you totally ruin something for an entire group of people.
"You totally quackenbushed the 8th grade trip."
Good awesome craziness.
A: Excuse me, but I'm pretty sure Representative Joe Wilson said "July!" Joe wanted to remind Obama about that lovely week Barack, he and an illegal immigrant spent in Key West discussing health care reform and giving one another coconut oil massages.
B: You've just been Quackenbushed!