趁他人形勢危急、混亂攞着數 (to take advantage of someone's chaotic situation; to fish in troubled waters; literally: to loot under the cover of fire)
動詞用例
疫症底下生意慘淡,業主仲要加租,仲唔係趁火打劫?
jik6 zing3 dai2 haa6 saang1 ji3 caam2 daam6, jip6 zyu2 zung6 jiu3 gaa1 zou1, zung6 m4 hai6 can3 fo2 daa2 gip3?
While the business goes south during the epidemic, the property owners raise the rent. Aren't they fishing in troubled waters?