「臭坑出臭草 / 臭罌出臭草」

(pos:語句)
<explanation>
yue:用嚟鬧人，指一個人出身低微，自然人格都低劣
eng:"it is natural that an inferior background will produce someone of low character", an insult to both one's origin and personality; literally, a smelly ditch (or jar) grows smelly grass
<eg>
yue:你睇個阿媽咁冇文化，個女又冇家教，真係臭坑出臭草。 (nei5 tai2 go3 aa3 maa1 gam3 mou5 man4 faa3, go3 neoi2 jau6 mou5 gaa1 gaau3, zan1 hai6 cau3 haang1 ceot1 cau3 cou2.)
eng:Look, the mother is so uncivilised, and the daughter behaves poorly; (it's such a proof that) a smelly ditch grows smelly grass.