Somebody who has enuresis (pisses the bed) well past his or her childhood years.

When you eat dirt for the first time and leave your family to build a shack in the woods

Asian male (or maybe female too), who has bleached his hair to look cool. While asian peoples bleached hair does not look blond, but more like some yellowish color like urine. So it looks like some person who has urine colored hair on his head.