具法律爭議嘅商業活動,即係半合法半非法嘅生意 (to engage in a business which is marginally legal, half legal and half illegal; to run a dodgy business)
用例
佢咁多年都係做啲鹹淡水嘅生意,揾埋揾埋都唔少。
keoi5 gam1 do1 nin4 dou1 hai6 zou6 di1 haam4 taam5 seoi2 ge3 saang1 ji3, wan2 maai4 wan2 maai4 dou1 m4 siu2.
He's done dodgy business for years and made a lot of money from it.