Derives of the words scrotum and pony tail
Found commonly on tom boys, middle aged lesbians, and artsy males who wear stylish ascots.
Co-worker 2: Yeah. When he walks it bobbles too and fro. When he stands it just hangs there useless and annoying. Kinda like a ball sack.
Co-worker 3: Oh...he's probably going for the Scrote Pony Look
(See Orlando Bloom's Hair in the first Pirates of the Carribean)