衒げん学がく

noun

pedantry; showing off one's knowledge

Refers to the act of flaunting one's learning or being overly concerned with minor academic details. Often used critically.

• 彼かれの話はなしは衒げん学がくに過すぎて、聞きいている人ひとは退たい屈くつそうだった。

  His talk was nothing but pedantry, and the listeners looked bored.

• 衒げん学がくをひけらかすより、わかりやすく説せつ明めいするほうが大たい切せつだ。

  It's more important to explain things clearly than to show off your learning.