v. To produce a product of such poor quality that the individual creating it commits mass murder out of sheer desperation n. Such a product
"I'm almost done with my invention, but I'm going to buy a gun first in case I McBeef."
"Did you see the McBeef that led him to shoot all those people?"
A creation from Kennewick Washington involving a McChicken order with two all beef patties and bacon with no lettuce or mayo... a slice of cheese in between each layer and ketchup on top. Created by Ian and Pat