Definition of rocket fuel in English:

rocket fuel

noun

  • 1Fuel for a rocket engine; specifically one that reacts with an oxidizer.

  • 2In extended use: something which has a stimulating or energizing effect; specifically a strong alcoholic drink.

  • 3Slang (originally US). The veterinary analgesic and anaesthetic phencyclidine, used as a recreational drug.

Origin

1930s; earliest use found in Popular Science Monthly. From rocket + fuel.

Pronunciation

rocket fuel

/ˈrɒkɪt ˌfjuːəl/