From Wiktionary, the free dictionary
bà (“grandmother”) + nội (“paternal”)
bà nội
- a paternal grandmother
- Synonym: nội
- Coordinate term: ông nội
- (humorous, sarcastic) a sarcastic way of addressing a young girl or woman who you're annoyed with
- Synonyms: bà, má, mẹ, nội
Thôi dẹp đê bà nội !- Bitch, please!
Kêu bà nội đó về dùm tui với !- Would you escort Her Highness home for me?