粤典 (words.hk)香港短语
開頭免去客套，講清楚條件先，按章辦事，然後再講禮貌 (to set clear expectations before being generous; literally: be a scoundrel before being a gentleman)
語句用例
先小人後君子，規矩點都要講明嘅。
sin1 siu2 jan4 hau6 gwan1 zi2, kwai1 geoi2 dim2 dou1 jiu3 gong2 ming2 ge2.
I'm going to be upfront and state the rules clearly before we proceed.