Derived from a notorious Australian pedophile Juy "Goo" Smith, nicknamed Uncle Juy, this saying is used in reference to someone getting screwed over. Also used to denote the pedophilic acts of others.
Man, Ive got that final exam on Friday. Looks like ive got a date with Uncle Juy
How young is that chick Dan is hooking up with? He's getting his Uncle Juy on!