noun: (informal) An action or stunt where a bicycle, motorcycle, or other vehicle is ridden for a short period while it is standing only on its rear wheel or wheels.
noun: (informal, chiefly Australia) A wheelchair user.
verb: (intransitive, informal) To ride, or perform the stunt of riding, a vehicle on its rear wheel or wheels.
adjective: (informal) Alternative spelling of wheely (“having wheels; mounted on wheels”). [(informal) Circular; suitable to rotation.]