Oh my narshe!
An exclamation that expresses both surprise and pleasure; a combination of the phrases "Oh my God" and "Nice!". The phrase "Oh my tart!" can be used as a substitute, with tart meaning tight (in the sense of cool or sweet).
Person 1: Hey, we have some left over pizza, do you want to get in on this?
Person 2: Oh my narshe!
Person 2: Oh my narshe!