My all-time favourite outfit (preferrably worn by a german) is a) white socks (preferrably pulled up as high as possible) in those sandals with velcro straps, b) cut off jeans worn as shorts(preferrably too short) and c) those "waist bags" (preferrably made of leather).
maybe he wore it for outside and just got back in or didn't feel like taking it off to fix his hair... do you really care that much of what people wear that you have to insult them?