p0oner
A p0oner is a player who has a low score but still thinks they're the best. They yell at everyone else like they're the boss, even though they're the one who messed up the whole game.
"You all are the worst!", while getting killed by a 7-year-old." "I'm the best player here!", after getting killed 5 times in a row." "I know what I'm doing!", while running into the enemy like a complete idiot."