I decided to open a discussion with the abovementioned slashed title as the outcome of a question raised in another thread (OMG! Your hair is so beautiful!): http://forum.wordreference.com/showthread.php?t=2583871&page=2&p=13036961#post13036961 Let us focus on the ways to express this OMG (Oh my God!) in Urdu, Hindi and Punjabi so that we might have an overview of the situations for those languages, respectively. Somehow, I presume that Urdu is at least not an underdog in this very aspect. greatbear has compared Hindi with Urdu and has come to the following conclusion: To begin with, QP SaaHib pointed out in that thread that the vocative particle for Hindi was ''he'' while Urdu uses the word of Persian origins ''ai''. Let me share one of the Urdu expressions which uses yet another particle: yaa (mere) rabb! Edit: TS SaaHib has used yet another particle for Hindi in that thread: haay rabba!