Usually refers to
men. Especially
men who don'
t pay much attention to their looks, in terms of grooming, hair and clothes.
However when they put some attention to it they look good.
Best example is Shaggy from Scooby-Doo. He always looks frumpy, stained, unshaven, slump, but you always
get the feeling that when he needs to escort Daphne
Blake to her gf wedding Shaggy after a shave and a nice getup will look good.
Girl 1: Are you crazy you want me to go out with Jonah
Hill,
yuck
Girl 2: Sweety, he cleans up good and will make you look great on that red
carpet