I'm not really a 'battle' kind of guy. I much prefer a 'why can't we talk about this over a cup of tea' method of conflict resolution.
That being said, when I do get carried away playing computer games or DnD, I tend to fall back on the short and simple 'BOOOOM!'.It's punchy, and it gets the point across. If I'm feeling really aggressive I may resort to 'BRING IT, BITCHES!', and of course, you cannot go wrong with the ever classic 'HAVE AT THEE!'.