唯我独尊

Meanings

1. Noun

   throughout heaven and earth, I alone am the honored oneFour-character idiomAbbreviation
2. self-conceit; self-centeredness; vaingloryFour-character idiom

• 本人ほんにんは唯我独尊ゆいがどくそんを決きめ込こんでいるようだけども、周まわりから見みれば単たんなるわがままだよね。

  He's completely convinced of his own greatness but to the people around him he's just a selfish jerk.