expression
lamenting one's enforced idleness
A rare literary phrase originating from a Chinese historical anecdote about a warrior who grew fat from inactivity and lamented his wasted potential. Used to express frustration at being forced into idleness when one wishes to be active.
「髀肉の嘆」とは、無為に過ごすことを嘆く故事成語だ。
'Hiniku no tan' is a classical idiom that laments spending time in idleness.
From a story in the Chinese historical text 'Records of the Three Kingdoms' about Liu Bei, who lamented that his thighs had grown fat from a long period without riding into battle, symbolizing wasted time and lost opportunities.