目の上のたんこぶ
Expression- 1a thorn in one's side ; a pain in the butt (often someone higher in rank, ability, etc.) ; a person standing in one's way ; a superior who obstructs one's freedom of action Translated by Jiyomi
Other writings and readings
目の上のたん瘤
expressions (phrases, clauses, etc.)
JMdict entry 2153150. Source and licence.