An insult used in video games. A person who is so bad and unpredictable that their unexpected actions may occasionally make them beat better players. They tend to use high-risk, high-reward tactics or all-in strategies to get an easy win, rather than having a consistent play style.
"...there are some things that can beat smartness and foresight. Awkwardness and stupidity can. The best swordsman in the world doesn't need to fear the second best swordsman in the world; no, the person for him to be afraid of is some ignorant antagonist who has never had a sword in his hand before; he doesn't do the thing he ought to do, and so the expert isn't prepared for him."