I'm using this pseudoname for about 4-5 years or so. Language differs depending on where it is used. If in places populated by lithuanians it will be "... kur nubėgo?" which in english means "... where did it run?". But english language sucks a bit for this. Why? - because if you want to have gramaticly correct structure I must use pronoun in a question. While in native version "who" is apparent. Making the question to look more abstract and void in the same time.
How I came up with one? that was my answer to random people at school asking me to share my cigarettes with them. Showing that I'm totaly not intrested in statisfying their needs I would ask them "... kur nubėgo?" instead of a proper answer or sharing a smoke. By using that question.. trying to play dumb which is of course obviuos. That way it turns into mocking rather than anything else.
So people in my school who weren't actually in any relationship with me and knew me only from public eye started to call me "... kur nubėgo?".
Since I needed a name which is quite silly and which I like I started to use it as my nickname.