Green’s Dictionary of Slang

a wheelchair; a wheelchair user.

1990		(con. c.1970) G. Hasford Phantom Blooper 181: The wheelies are playing basketball [...] Recently amputated men play basketball to learn how to control their shiny new wheelchairs.
1996		J. Cameron It Was An Accident 14: Half of them geezers you never trusted on taking your grannie home, have to steal a wheelie for it.
2012		interview on BBC World Service 10 Sept. [radio program] I broke my first world record on how long I could roll a wheelie, you know, a wheelchair.