Gua sha, which is a traditional Chinese medical treatment
Definitions (粵典–words.hk)
動詞
比喻好艱辛咁做嘢嚟勉強咁生活到。 to have a tough time; literally: to scrape sand
阿松佢早排破咗產，而家刮緊沙。
阿松佢早排破咗产，而家刮紧沙。
aa3 cung4 keoi5 zou2 paai2 po3 zo2 caan2 ji4 gaa1 gwaat3 gan2 saa1 A-chung just went bankrupt. Now he is having a tough time.