A common joke of which secretly mature persons use. Most appearances of this "humor phrase" can be found in small dissing battles of American origin.
Susie's mom is like a public bicycle, everyone gets a ride.
Bicycle(s) used freely by the urban community for transportation purposes. A bicycle not owned by any particular person, but shared by community members. Formerly a suburban bicycle.
Tyron pedaled the public bike to the fresh mart to purchase a pack of newports. Jackson decided to take the public bike to the payphone. Jackson left the bike at the barber shop for the next lucky rider.