Anyone who rides a form of pedalled transportation. Bicycles, tricycles, pedal cars, unicycle, freakbikes, ratbikes, etc.
The word "cyker" helps to define the difference between the motorcyclists who call themselves "Bikers" and the people who actually ride bikes.
More than one "cyker" is known as "cykerz". The "z" shall be used in place of the usual "s" when referring to more than one. This is for the coolness aspect of being a cyker!
People who ride motorized forms of transportation are in no way to be considered a Cyker.
The motorcyclists have stolen the term "biker" from us, so from this day forward, all bicyclists shall be referred to as a "Cyker"!