How to pronounce 乖乖 in Cantonese (5 out of 7):

乖乖哋咁
They're like this.

Cantonese Sentence Breakdown

乖乖 gwaai1 gwaai1
be good; well-behaved (spoken)
dei6
(Cant.) plural for pronouns
gam3
so (Cantonese)
Mandarin equivalent: 这样zhèyàng [这样], like this