A girl who acts as a surrogate sex partner shared by an anonymous group such as a town or province.
A girl who fucks so many men that she approaches the annual statistics of a public service likewater or garbage utilities.
The sexual equivalent of a public urinal
Guy 1: Shelly is a tandem town bike cause i heard she is letting people go 2 or 3 at a time now.
Guy 2: Sheesh!, That broad has seen more dick than a stadium urinal.
A female who gets ridden by all comers (cummers). The word "comers" is a double entendre also meaning "cummers" - semen ejaculators.
A female who pedals (peddles) her ass around town or who is pedalled (peddled) around town. The word "pedal" is a double entendre also meaning "peddle" - to sell.
Almost everyone has ridden the/that Town Bike. The Town Bike is a joy ride. The Town Bike is pedalled (peddled) all over town.
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.