What do you do when you want to wring someone's neck?

Do you wring it? Do you tell them you want to wring their neck? Or do you keep it a secret until you sneak up behind them while they’re in line at the coffee shop, stab them with a shiv, plant it on the guy in the trenchcoat, and sneak away?

ON A SERIOUS NOTE:
Currently, I’m the vice president of an organization that has a multi-thousand dollar event coming up, and the “president” has completely checked out. I have called and emailed him multiple times per week, every week, and haven’t heard from him in two months. I pretty much hate the guy and want to kill him for leaving me to do all of this work on my own. Besides the fact that he’s the supposed “president” officially, he’s been in the organization longer than I have, and knows how to do things I don’t. It’s not just that I have to do stuff myself, it’s that I have to re-invent the wheel because he won’t return my phone calls.

It’s not about the credit, everyone knows I’m doing all the work and acting as president; all of the other members of the organization respect and look up to me. It’s not that.

It’s that I need HELP!

What’s your best advice?