撑腰

撑腰	chēng yāo	to support / to brace
撑	chēng	to support / to prop up / to push or move with a pole / to maintain / to open or unfurl / to fill to bursting point / brace / stay / support
腰	yāo	the waist and lower back / (bound form) kidney of an animal (as food) / the waist of trousers or a skirt / (metonym) money pouch; pocket / (bound form) the middle section of an upright object (mountain, bottle etc)