to investigate someone's background and make them public
Definitions (粵典–words.hk)
動詞
挖起底細，查清某個人嘅背景 to check up on somebody's background
佢入嚟呢間公司做之前已經俾人起晒底。
佢入嚟呢间公司做之前已经俾人起晒底。
keoi5 jap6 lai4 ni1 gaan1 gung1 si1 zou6 zi1 cin4 ji5 ging1 bei2 jan4 hei2 saai3 dai2. His background was checked up before he came to work in this company.
動詞
揾出同埋公開某個人嘅姓名同埋其他個人資料 to dox; to find out and expose someone's name and other personal details
起你底
起你底
hei2 nei5 dai2 to dox you
可以用嚟起底
可以用嚟起底
ho2 ji5 jung6 lai4 hei2 dai2 can be used for doxxing
佢俾人起咗底，全名同電話都俾人放咗上網。
佢俾人起咗底，全名同电话都俾人放咗上网。
keoi5 bei2 jan4 hei2 zo2 dai2, cyun4 meng2 tung4 din6 waa2 dou1 bei2 jan4 fong3 zo2 soeng5 mong5. He was doxxed. His full name and phone number has been uploaded online.
Definitions (Wiktionary)
verb, Hong-Kong
to check up someone's background (especially on the Internet); to doxx