mad gas 

Sort of like saying something is "cool". Originated in Raffles Institution circa 2021, entered the general lexicon in 2022.

Variants include sad gas, gone gas, rad gas and bad gas. You can also add gas to the end of your sentence to give it a gas quality.

"I finished my whole chem tutorial" "mad gas bro"

mad gas by TeddyStan May 21, 2022

mad gas on the grill 

An expression (traced to the skateboarding community of the early 1990's in Syracuse, NY) expressing the possession of particularly unattractive facial features.

Sam: Are you gonna call up that girl you met yesterday?
A-dog: Nah son, she had mad gas on the grill.

mad gas on the grill by word.smith May 29, 2008

mad-a-gas-car

Refers to a driver, driving a gas car, having road rage, commonly against electric vehicles. Mostly Teslas.
Verb.

This dude's about to mad-a-gas-car !

mad-a-gas-car by 72Pigeons February 24, 2025

madgasm 

When a person becomes instantly and completely infuriated. This anger can be completely irrational or totally called for.

She had a madgasm when I called her pudgy.

madgasm by SKAlison October 13, 2007