Green’s Dictionary of Slang

1. a pilot.

1946		F. Haman Air Words.
1956		St Joseph News-Press Gaz. (MO) 4 Apr. 2D/3: [of a bowling team] The Throttle Jockeys of Omaha cling to their team lead.
1984		J.R. Elting et al. Soldier Talk.
1996		J.J. Nance Pandora’s Clock 163: ‘I’m tired of being bossed around by some overpaid throttle jockey!’ Two other passengers raised their voices at the protester.

2. a hot-rodder.

2000

(con. 1940s–60s) Décharné Straight from the Fridge Dad.