a small 3 wheeled tricycle for children usually under the age of 4. this bike consists of one approximately 10 inch wheel with pedals at the front and 2 small 5 inch wheels at the back. the dinky may also have a small tray beneath the 2 rear wheels.
the dinky is usually blue in colour with a yellow or white, flat seat. these bikes can be ridden by adults for a joke or to take off a jump for fun.
the boy was very proud of himself. he was the only boy in the neighbourhood with a shiny new dinky, he could not wait to ride it.