How to pronounce 細妹 in Cantonese (5 out of 6):

細妹, 咩事呀?
Little sister, what's going on?

Cantonese Sentence Breakdown

wai6
hey, an interjection to call for attention
to express one's dissatisfaction
to try and make a suggestion
to feed (an animal, baby, invalid etc)
細妹 sai3 mui2
a younger sister
咩事 mik6 si6
what's the matter
haa1
(particle equivalent to 啊 after a vowel, expressing surprise or doubt)