自じ己こ肥ひ大だい

noun

self-aggrandizement; self-glorification; self-inflation

Refers to the act of making oneself seem larger, more important, or more powerful than reality, often in a psychological or social context. The literal image is of something growing by feeding on itself.

• 彼かれの自じ己こ肥ひ大だいぶりには周しゅう囲いも呆あきれている。

  People around him are fed up with his self-aggrandizement.

• SNSでの自じ己こ肥ひ大だいは、時ときに人にん間げん関かん係けいを壊こわす。

  Self-glorification on social media sometimes ruins relationships.