hit the gas

cooking with gas

Functioning particularly effectively; achieving something substantial.

don't let the door hit you on the way out

Used as a command to leave in haste, or to indicate that one is glad, or at least unmoved, to see the addressed person leaving.

fall out of the ugly tree and hit every branch

To become extremely unattractive.

gas and air

An equal mixture of nitrous oxide and oxygen, used as a mild analgesic and anaesthetic, particularly during childbirth, for dental procedures, and in emergency medicine.

have a gas

Have a good time.

hit a lick

To earn a large sum of money in a short amount of time, usually illegally.

hit a snag

To encounter an unexpected problem or delay.

hit a wall

To come up against an insurmountable problem.