Whenever someone is being a complete moronic douche-bag of a whore, it is common to call them this name. Only use in cases where the women looks like an ugly lesbain.
Guy #1: Man that bitch uses the word Retarded while her kid looks Autistic!
Guy #2: That ugly stupid bitch is dumber than a short haired red-head.
The wise uncle meenan, that works diligantly at champs sports and helps the corporation conquer the shoe industry onefoot at a time, while protecting its "Friendly Hero" from malicious phone calls.
Meenan: "Thank you for calling champs sports where all shoes are buy one get one half off, this is the red haired master how may I help you."