Fake word. Not a contraction. The phrase is "you all". Used by fake Southerners and Black wannabes. Hipster douchebag slang.
Did y'all see that game where Giannis kicked ass?
Repetitive.
Anyone claiming to be "a hipster" that thinks there is a difference between a hipster and a douche as if there's anything to love about hipsters. Or douches.
That guy is such a hipster douche. He gives hipsters a bad name.