v. Slang 1. To make some engine work faster by injecting it with fuel: The mechanic revved up the engine before the race. We revved the engine up and sped off.
2. To work faster due to an injection of fuel: The old car's engine revved up when I pushed the accelerator.
3. To make someone or something more lively or productive: We had a pep rally to rev ourselves up for the game. The administration is making efforts to rev up the economy.
4. To increase in rate, amount, or activity: Production revved up after the war started.
5. To improve the quality of something: We need to add something to this batter to rev up the flavor. Those candles really revved up the festive atmosphere.