人の褌で相撲を取る
Idiom- 1to profit at someone else's expense ; to rob Peter to pay Paul ; to take risks with other people's money ; to wrestle sumo in someone else's loincloth Translated by Jiyomi
Other writings and readings
人のふんどしで相撲を取るひとのふんどしで相撲を取る
expressions (phrases, clauses, etc.) · Godan verb with 'ru' ending
JMdict entry 2788200. Source and licence.