The Rice University Neologisms Database

(widely thought to be but not verified) Short for Gulfstream G650, a twin-engine jet airplane whose estimated price apparently exceeds $58 million. The word is used to indicate a high level of style that surpass the average. It is a metaphoric neologism that compares extraordinarily cool people to the brand new jet. This term was popularized by the pop song “Like a G6” and is presumed to be used widely among young people.