Top Definition
pure gas is a phrase used to describe a person or situation. if you are on pure gas it is because u did something crazy, out of the blue, by surprise, funny, etc. if a situation is pure gas it usually means it is dumb, not necessary, or jus plain crazy. pure gas originated in philly and is commonly used today.
1. Wow, did he really just say that? he's on pure gas...

2. You ate how many perks? damn you're on straight gas.

3. This was gas comin here in the first place.
by giggles215 May 16, 2009

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