The so popular and classy "Cheers'C*nt!", started in the Sydney suburbs not by locals but
international students.
Following that the classic GC = Gay C*nt or DC = Dopey C*nt appeared
Widely used by waiters and bartenders in order to stay classy in front of customers while paying the utmost respect to colleagues (like little code names if you may).
Also sounds like the "si, si" used by
Frenchies, Italiens or Spanians in their respective
languages.