Merriam-Webster's Collegiate® Dictionary, 11th Edition
JOCKEY
I. noun (plural jockeys)
Etymology: Jockey, Scots nickname for John
Date: 1643
a person who rides or drives a horse especially as a professional in a race, a person who operates or works with a specified vehicle, device, object, or material ,
II. verb (jockeyed; jockeying)
Date: 1708
transitive verb to deal shrewdly or fraudulently with,
2. to ride or drive (a horse) as a jockey, drive , operate ,
3. to maneuver or manipulate by adroit or devious means , to change the position of by a series of movements , intransitive verb to act as a jockey, to maneuver for advantage