- exclamation goodbye. This announcement that one is leaving is probably a playful deformation of the phrase ‘I’m out of here’, punning on the brand of German luxury car coveted by young males. It almost certainly originated in black street slang where the variant forms ‘Audi 5000!’ or simply 5000! are also heard. By the mid-1990s, the term was also in use on campuses and among high-school students.