Wendy's spicy chicken sandwich. There was a Wendy's on campus where I went to uni, and I lived off those things for four years. I don't do that *now*, fortunately, but the urge is still there. *drools*

There's a Canadian burger chain called Harvey's that makes fantastic burgers, but weirdly, the most cracklike thing about them is the dill pickles they use as garnish. BEST PICKLES EVER. (This may be a hereditary fast-food craving: when my mom was pregnant with me, she'd get pickle cravings for Harvey's pickles *specifically*, and would get a packet of them on the side of her order.)