Bu cu

Means "suck my dick" in Vietnamese.

Person 1: Du ma, bu cu!
Person 2: *rolls eyes* Cac du ma, bu cu!

by CAC DU MA KHONG BIET June 04, 2018

Cac du ma khong biet

Vietnamese saying. Literally translates to "penis motherfucker don't know", but is used like "Fuck, I don't know this."

Person 1: *sees some math shit* "Yo, do you know this?"
Person 2: *sees it* "Cac du ma khong biet."

by CAC DU MA KHONG BIET June 04, 2018