bak 

Bak is an internet accronmym for back at keyboard.

<person1> were are you?
<person2> I were afk, but now Im bak.

bak by Afro123 February 3, 2008

BAK 

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.

"I'd whip these BAKs if I could, but I'm their teacher!"

BAK by I know where it's at! October 31, 2009

bak 

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

JohnDoe: BRB
JaneDoe: okay
(5 minutes later)
JohnDoe: bak

bak by Nad The Man May 6, 2006

BAK 

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.

Do you know BTS? They just got a BAK !

BAK by Jeona June 11, 2018

Bak 

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.

He rejected my invitation and didn't come to my party. He is so Bak

Bak by ilias_gr4 November 16, 2019

bak 

the state of going african on an individual.

BAK!!!(as one walks by)

bak by baak February 24, 2009

BAK 

Acronym for "Big Asian Cock"

Coleman stuck his BAK in the ceiling fan causing it to brake.

BAK by Kinimbo78 September 22, 2020