1) Noun. A Canadian wookiee.
2) Noun. A furry man or woman with a northwestern accent.
3) Verb. To rip one or more of someone's limbs off while saying "Eh" or "Doncha know?" or "You betcha!"
1) During a trip to Ontario, Steve saw an elusive Quebacca flipping him off from its ice cave.
2) Did you see that hairy canuk yesterday? What a total Quebacca!
3) After the lumberjack was called queer by the New Yorker, he Quebaccaed the shit out of that Yankee fuckwad.