A person who wears a purple article of clothing, (usually a shirt), way too much
Bob: That guy has worn a purple shirt to work everyday this week.
Bill: I know. He is such a Purple Bitch.
(The original Purple Bitches are Barny and Justin T.)
The ultimate insult, also known to induce high amounts of confusion
Yeah, well, your just a...a...a.. a big purple bitch!