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.
Person A: So, how was last night?
Person B: uksuks, uksuks, 'nuff said.