It is a term know within the European CS:GO community and derivates from "unlucky". It has been made popular by players like Lobanjica, Stark & JW ( steamcommunity.com/groups/Unlukers ) while streaming FPL (Faceit Pro League) Matches on Twitch.tv whenever a player messes up a round.
An exclamation (pronounced youbluekin) called out by one's nearby associates when said person has committed an error in judgment, or somehow screwed the pooch. See its shame-filled relative, Iblukin
Can also be referenced by asking "How did Ken taste?"
An onomatopoeic word primarily used to provide a verbal soundtrack on a night out. Generally repeated ad nauseum, beatbox style. Can also be used as a means of punctuating sentences, as an exclamation, or to define the particular awesomeness of an evening's exploits. Of Brazilian/Swedish/Maltese origin.
On Nov 20 we must appreciate the ÚkbÚk's around us all. the day starts with a prayer to the great lord ÚkbÚk then a sacrifice (The blood of virgins or your firstborn child will do). Anyone who does not participate in this holiday will be labelled a heretic and will be burnt at the stake.