私し腹ふく

noun

one's own pocket; personal profit

Used almost exclusively in the idiom 私腹を肥やす (to line one's own pockets). Refers to illicit personal gain, especially by someone in a position of trust.

See also: 私腹を肥やす

• 彼かれは公こう金きんで私し腹ふくを肥こやした。