Its where two people are talking a load of shit basically. You add tanganang to any word you want. Primarily you add it to words that end in a consenant that dont sound like a vowel. W for instance sounds like and o at the end. Y is often pronounced E at the end. You'll figure it out ingood time.
Such as Holepunchatanganang. (Holepunch)
Such as Computeratanganang. (Computer)
Such as Pentanganang. (Pen)
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"