A derivative of the driving-finger, more often used by individuals on a bike. Frequently displayed by bike-messengers/cycle couriers to comment on the ass-hattery of Traffic Officers.

Note: may be utilized with both hands (dual-bike-finger) and is often presented with verbal accompaniment.

A person with an outwardly dominant, masculine, or aggressive personality, but who also enthusiastically takes on the submissive or "bottom" role in the bedroom.