Bak is an internet accronmym for back at keyboard.

Acronym for a Bad Ass Kid. It is not meant in a positive way, it means the child is naughty, disrespectful, backtalking, disobedient, spoiled, etc. etc.

Slang for 'back'. Lazy people use this a lot to signal their friends after they state BRB or BBL.

BAK stands for Billboard All Kill invented by the South Korean Boy Band BTS who achieved #10 on BB HOT 100 with Fake Love , got #1 on BB 200 Albums with LY_Tear , #1 on BB Digital Songs with Fake love and having all 11 tracks of LY_Tear charting on World Digital Song Sales.

the state of going african on an individual.

Comes from bak (back at keyboard). You can name a person just like that when he shows signs of anti-social behaviour. The worst case scenario is that he will find family tables as an excuse to avoid going out, despite that he will be playing video games all night.

Good bak is an occurrence that often occurs when one is drinking beer with his friends, rapidly getting drunk and enjoying the moment.
The word is usually spoken by Good Bak practicers whenever they're having a great time.