Once in a game, click on the big guy with a rocket launcher. After that, spawn in, move out of the safe zone, and shoot with the rocket launcher on the ground. repeat till die

First, get in to a game. Next, you pick this black dude with a grenade launcher, which is also a raging alcoholic
Next, you would want to shoot at your legs with either his primary or his secondary. I would prefer the primary because it doesn't launch you upwards and you will die faster instead.

You killed yourself! Now go, dinner is ready