I often play gomokunarabe on an international server, where I sometimes face Russian opponents, and there appeared a very strong mysterious Russian-speaking player about a year ago. Many players want to know who he is, but he keeps anonymity despite being quite talkative in chats during games.
His Russian, however, is somewhat special, as pointed out by another player in a conversation with me, but the latter player was unable to say which dialect or slang type it is.
As I was told, the most distinctive linguistic feature of the mysterious player is the frequent use of the verb "орнуть," like in the example below:
Как можно было не заметить такой выигрыш? Я прямо орнул.
I was told that he used that verb quite a few times and that it is a highly untypical verb that is not used in the standard Russian language at all, at least in informal communications like online chats.
My question is this: Which Russian dialect or slang type does "орнуть" belong to?
In other words, I am curious as to what reasonable guesses about the geographic location could be made based on the frequent use "орнуть." Apparently this verb is commonly used in the environment of the mysterious player.
Based on some other, non-linguistic signs, we think he might be a well-known strong player from Kharkiv, Ukraine, but we are highly unsure, so I am particularly curious whether "орнуть" is used in the Kharkiv region.