down at - heel
It's a Chinese idiom. Pinyin is n à J à zh à ngju é, which means wearing shoes and breaking heels. A ragged dress. It's from Chuang Tzu rang Wang.
The origin of Idioms
"Zhuangzi rang Wang" said: "three days without fire, ten years without clothing, crown and tassel absolutely, catch Jin and elbow see, accept the gun and heel decision."
Idiom usage
Living in poverty
down at - heel
roll up one 's sleeves and raise one 's fists to fight - xuān quán luō xiù
seek out able men and receive them - nà shì zhāo xián
write cursive characters in a vigorous and nimble style - jīng shé rù cǎo