結拜細佬 (git3 baai3 sai3 lou2) — one's younger 'sworn' brother (who have sworn an oath of loyalty together) [colloquial] in Cantonese
git˗₃結baai˗₃拜sai˗₃細louˊ²佬简 结拜细佬
Mandarin Pinyin: jie2bai4 xi4 lao3
Meaning of 結拜細佬
nounone's younger 'sworn' brother (who have sworn an oath of loyalty together) [colloquial]