(Ru)banst

A word tag commonly used by a younger sister to annoy her older brother.
You can add -banst to any name (Paul=Paubanst;Jacob=Jabanst;...)
In this specific case, -banst is added to the name Ruben.

(In the case (Ru)banst )
A:Oh, hey, Rubanst!
B:Wait, what did you just call me?
A:Ah, nothing I said hey Ruben- of course!
B:Hmmmmm, okay, nevermind!