Also known as a, "wheelie." An acrobatic driving or riding stunt, of lifting the up the front tire(s) or wheels, while temporarily putting or shifting the weight of the vehicle onto the back ones. This pertains to skateboarding, bicycling, motor vehicles capable of sudden acceleration. motorcycles, etc. For vehicles larger than a motorcycle, it means the weight is intentionally shifted beforehand to the back half of the vehicle as to make it easy for the front to rise into the air during acceleration, especially on a tarmac's slope.