Green’s Dictionary of Slang

throttle-jockey n.

[SE throttle + jockey n.2 (3b)]
(US)

1. a pilot.

F. Haman Air Words.
[US]J.R. Elting et al. Soldier Talk.
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.

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