A person who likes themselves, and think that they are good looking, but infact is the opposite.
The person usually also think that they are good at a lot of things, without being it.
Bro, you're such a Kapper, it's crazy.
An idiotmongol is a person who is extremely ugly, but just does not know it. He or she also has a very low iq, and is dyslexic, and is typically called kasper.
The idiotmongol, was stupid enough to think that it wasnât extremly ugly.