smug

他赢得比赛后露出了得意的笑容。

He gave a ___smug smile after winning the competition.

他脸上那副自鸣得意的表情让所有人都感到不舒服。

His ___smug expression made everyone feel uncomfortable.

他考了满分后，脸上露出那种令人讨厌的得意笑容。

After getting full marks, he wore that ___smug smile that annoyed everyone.