(adjective) ill-mannered; uncouth; to describe someone with vulgar behaviour (with the implication that his family did not raise or teach him well)
Definitions (粵典–words.hk)
語句
指責對方家庭唔去教識某人一啲一般社交禮儀、社會規範等。 to be badly behaved, to have bad manners
同人講嘢記得要有禮貌,唔係因住俾人鬧你冇家教呀。
同人讲嘢记得要有礼貌,唔系因住俾人闹你冇家教呀。
tung4 jan4 gong2 je5 gei3 dak1 jiu3 jau5 lai5 maau6, m4 hai6 jan1 zyu6 bei2 jan4 naau6 nei5 mou5 gaa1 gaau3 aa3. You should be polite when talking to people. Otherwise, you might be blamed for having no manners.
近義詞
有爺生,冇乸教
Definitions (Wiktionary)
adj, Cantonese, of children
ill-bred; having no manners; behaving poorly (syn.) 冇仔教