leeroy jenkining

To spontaneously throw caution out the window and run into battle yelling "LEEROOOOY JENKIIINS!"

Either the bravest SOB in World of Warcraft history, or the stupidest; depending on your point of view. Rushed into an enemy stronghold alone, roaring his name; forcing the rest of his guild to follow and turning their chances of victory from 32.33(repeating)% to zero. At least he has chicken.

To "pull a Leeroy Jenkins" is to rush into a dangerous situation alone without following strategy, forcing your allies to follow and leading to the inevitable, definitive, graphic demise of your team. In essence, your entire team got wombo comboed because of you. If you don't try to laugh this off by saying, "At least I have chicken", or at the very least acknowledge your foolishness, you not only fail at the game, you fail at life.
Note: NEVER try to pull a Leeroy Jenkins if you're an actual member of the military. Chances are no one will make it out alive. And you won't even have chicken to comfort you.

n.
1: One who does not grasp the concept of caution.
2: One whose success is based purely off relentless aggression and pure luck.
3: One who likes chicken.
4: One whose battle cry consists of their own name.

v.
1: To destroy all hopes of success.
2: To rush headlong into danger without regard to consequences.
3: To satisfy one's own desires at the expense of all around oneself.

Leeroy Jenkins- Doing it Leeroy Jenkins Style. Meaning to do something so bloody wild that youll be talked about for months because it was bloody insane.

someone who is so wreckless in a video game that it is downright insane

is apparently stupid as hell, but at least possesses chicken.

When you and your partner discuss at long the intentions of your sexual persuits right before you make love. Then at the last second the male abandons all this and screams, "Leeroy Jenkins!" and just penetrates and goes to town.