having a proud or self-satisfied air; looking pleased with oneself (often implying a smug or triumphant expression).
テストで満点を取った彼は得意げに答案を見せた。
After getting a perfect score on the test, he proudly showed his answer sheet.
子どもが自分で作った作品を得意げに披露した。
The child proudly displayed the work they had made.
得意げな態度は時に他人を不快にさせることがある。
A smug attitude can sometimes make others uncomfortable.