In addition to being a somewhat famous singer, it is also a new slang term (code) for instructing someone to pick up a "gar" (
dutchmaster, philly,
swisher, etc.). It originated in Miami and is slowly gaining steam across the country.
Greta Garbo = "Get a
'gar, bro!"
::
ring ring::
Person A: Hey, you around?
Let's burn!
Person B: Sure. Greta Garbo.
Person C: Heard! I'll stop by
the gas station.