When someone does something awesome, but continues to milk it for more than it is worth. When your friend gets an amazing kill in a Modern Warfare and continues to brag about it.
Guy 1: Dude did you see that I got a head-shot on that guy from across the map.
Guy 2: Yeah that was awesome!
Five minutes later...
Guy 1: Did you see that awesome kill earlier from across the...
Guy 2: Don't be a skadouchbag