Meaning of どくそん in Japanese

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Definition of どくそん

どくそん(dokuson) 【独尊】

ゆいがどくそん(yuigadokuson) 【唯我独尊】

(n) self-conceit; self-centeredness; vainglory
本人は唯我独尊を決め込んでいるようだけども、周りから見れば単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.