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.
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.
- We were doing great until that idiot totally Leeroyed us.
- The party was really boring until Bob pulled a Leeroy.