What does gas in slang mean?

The term and slang “Gas” is a noun, which was popularized by rappers to reference weed and/or marijuana.

What does gas example mean?

Gas is defined as an air-like substance that expands to fill the space it is in. It also refers to a substance used as fuel. An example of gas is helium. An example of gas is the fuel you put in your car to get it to move. … An example of gas is when a car exhaust gives off fumes into the air.