Like so many abbreviations on social media such as: LOL, OMG, BRB, Etc., an abbreviation for "Damn Auto Correction", which is a way to apologize for wrong word or spelling, when the Auto Correction of a smartphone predict the wrong word.
Hey, what kind of haircut do you have, it looks like a d*ck in the hair is it a new hairstyle? -Random Person
Yea, it's Dac cau, one of the newest and most famous in my province - Binh Duong Person