"Sit n' Wait" for Steak & Shake....there's one just south of my parents' house where it can take about half an hour just to get your drinks.
"F- my/your couch" from Dave Chapelle, for when you just don't care while breaking or trashing something that belongs to a friend.
One more for Taco Bell: TOXIC HELL!!!
"Pop" for 'soda'...I guess maybe one day the rest of the nation will catch on. Hehehe