When a female has an uncontrollable passion for seeking out and then copulating with redheaded men. Her longing for the "ginger rod" cannot be tamed. Redheaded men beware, she'll jump your bones the first chance she gets.
Sean: Dude, how did you get laid last night, everyone fucking hates gingers.
Jake: I'm not sure, she was like a dog in heat when I told her I was a natural ginger.