Usually a teenaged girl (but could be a gay boy) who hangs about boys who are into Cars.
Boy Racers 'girlfriend' (usually temporary) who like the boys more than the cars, but only hang round boys with cars.
Comes from... Rota=Rotary Motor, and Whore (of course).
Originates NZ, 2005.

A polite term for shoving a lubricated probe into the Earth's hole to release gas.