Hayden: "Dude, she's slept with so many guys. I'm thinkin' arby's."
2. A courteous declination to an unpleasant proposition.
Dude #2: "I'm thinkin' Arby's!"
Friend #1: "What do you think about going to Kevin's place after the game?"
Friend #2: "No way, dude. Kevin's a jerk! I'm thinkin' Arby's."