Wiktionary
hit the gas
vb. (context idiomatic English) To go; go faster.
Usage examples of "hit the gas".
So he was the only one who didn't see the Chevy as it hit the gas pumps on the upper island and sheared them off.
When I came to a hill and crested, I hit the gas and let the momentum bring me up to the limit and over.
Space opened behind Adam and Eve, DJ hit the gas and the car slid across Canal into Bourbon Street, the crowd parting as reluctantly as the Red Sea probably had for Moses.
He lunged for her as she hit the gas, and she winced as his big grasping fingers dug into her arm.