gas
Definition
A substance or matter in a state that expands freely to fill any space available, regardless of its container, unlike solids or liquids.
Gasoline or petrol (especially in American English), a volatile fuel used primarily in internal combustion engines.
A mixture of gases, such as natural gas, used for heating, cooking, or generating electricity.
Informal: Flatulence or intestinal gas expelled from the body.
Slang: To accelerate a vehicle by pressing the gas pedal; or to chat or boast excessively.
Examples
After chugging that mystery soda, he turned the elevator ride into an unintended gas chamber.
She floored the gas to escape the world's slowest toll booth line, emerging victorious like a drag racer.
That vintage comedy special was pure gas—laughs so hard I nearly passed my own.
Don't gas up your ego before the meeting; the boss already has enough hot air in the room.