In life, there are something happened to people, tacit situation they compete each other. Or obvious situations people compete. If there is no explicit sign of winning, some people feel they won, especially when it is not true.
The psychological accord and complicated chain of understanding, some people deluded they are won.
Korean people call this situation 정신승리 where 정신 is mental, 승리 is victory.
People who regard they are 정신승리 sometimes failed to appreciate reality both when they are victim or they are offender, which is expression either the empathic or the ignorant modes.
It is the Internet jargon, so rarely used in official places, but in drama script or entertainment programs it is used sometimes.