Crocs ("those rubber sandal things"), flip flops, turtlenecks, anything that screams "cowboy," fur (not because it's murder, mostly because it's gaudy), anything orange.
Apparently, my fashion sense would offend most of our membership here; I typically wear shorts or jeans with skate shoes or athletic shoes, a polo shirt or t-shirt, and a baseball cap. Oh, and plaid, but I only dig it if it's brightly colored.