Give 'er some gas!, 5 letters
Go fast!, to a driver, 5 letters
Hit the gas!, 5 letters
Put the pedal to the metal!, 5 letters
Speed up, driver!, 5 letters
Hit the accelerator, 5 letters
Cement mixture, 6 letters
A mixture of cement and sand and water that is sprayed on a surface under pneumatic pressure, 6 letters