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1.
The term "on the gas" is to used to describe a person or persons who are currently or have been, drinking alcohol.
Dave: "Hey man, what did you get up too in the weekend?"
Mike: "Oh, me and a few mates when down to the local bar and got on the gas, Saturday night."
Dave: "So, a quiet one on Sunday then?"
Mike: "Yep, you could say that."
by buckonz February 19, 2009

Words related to on the gas

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2.
Someone who is using performance-enhancing drugs.
"Pro wrestlers? Yup. Totally on the gas."
by D. Gould December 06, 2008