How to pronounce 成日用 in Cantonese (4 out of 5):

但係原來「塞豆窿」成日用來形容小朋友
But "Sea Cuckoo" was often used to describe children.

Cantonese Sentence Breakdown

但係 daan6 hai6
(conjunction) but
原來 yun4 loi4
originally
塞豆窿 sak1 dau6 lung1
the slang for a young kid or child
成日用 sing4 jat6 jung6
use all the time
loi6
to greet and welcome guests
形容 ying4 yung4
describe
小朋友 siu2 pang4 jau5
children