A type of accident in which the rear tyre of a motorcycle loses and suddenly regains traction on a road surface when cornering, resulting in the rider being thrown into the air and over the motorcycle. Frequently attributive, as "highside accident", "highside crash", etc.
1970s. From high + side.
Of a motorcycle or its rider: to have a highside accident. Also with object (in passive).
1970s; earliest use found in AMA News. From highside.