try to come up with a hype word or phrase to yell at your opponents and/or say in passing. I do it a lot in beer pong, basketball, soccer, and other day-to-day activities. For example, occasionally in beer pong, just before i shoot i'll say "flame on" or "not gay". the latter is an inside joke, as is the former, however you get the idea.
sparknotes: pick one funny/insulting word or phrase to say to your opponents and say it all the time throughout the game; before you serve, in celebration, when you shake their hands after defeating them, etc.