Jyutping
lau4 sau2 ji4 tung4
Pinyin
liú shǒu ér tóng
Definitions (CC-CEDICT)
"left-behind children", rural children whose parents have to make a living as migrant workers in distant urban areas, but cannot afford to keep the family with them
Definitions (Wiktionary)
noun, Mainland-China, neologism
left-behind children (children of rural parents who grow up in a rural area while their parents seek work in an urban area)