G5 (slang) Type: noun, slang Pronunciation: /G-5/ Also spelled or known as: G-5 What does G5 mean or stand for? Gulfstream 500; G500, a private jet aircraft. G5 Synonyms: PJ Example sentence: “We went to Miami from ATL in a G5.” G5 in songs: “Dinner with my man on a G5 is my idea of a update” – Nicki […]