「便宜仔」

(pos:名詞)
<explanation>
yue:#繼子；#油瓶仔（帶強烈貶義）（量詞：個）
eng:stepson; literally: "unearned son" (strongly derogatory)
<eg>
yue:個男仔真係唔話得，娶咗個女人仲幫佢養埋個便宜仔。 (go3 naam4 zai2 zan1 hai6 m4 waa6 dak1, ceoi2 zo2 go3 neoi5 jan2 zung6 bong1 keoi5 joeng5 maai4 go3 pin4 ji4 zai2.)
eng:The man is truly commendable to have married that woman and helped raise her son from a previous relationship.
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<explanation>
yue:指男方#戴綠帽，由伴侶生出嚟，但係自己唔係#經手人 嘅仔
eng:a son who turns out not to be one's biological child (e.g. because one's partner had an affair)
<eg>
yue:個男仔真係慘，養咗便宜仔咁多年今日先發現。 (go3 naam4 zai2 zan1 hai6 caam2, joeng5 zo2 pin4 ji4 zai2 gam3 do1 nin4 gam1 jat6 sin1 faat3 jin6.)
eng:The guy is so pitiful. It wasn't until today that he found out he had been raising a child who wasn't biologically his.