A Megnutian Collapse
A big lead lost because someone thinks they're untouchable and acts like a jerk.
'They were up 2-0, and then they lost 0-2.', @GameFanatic101
'He was bragging the whole game, and then he lost.', @SportsDude99
'They were leading, and then they acted like they were the best, and then they lost.', @TeamTalk