2) Noun: A powerful punch, a knockout punch.
3) Noun: sound of a gunshot.
2)"I hit him with the blakka!- Blakkaman"
3)"dont worry bout your man thats why i carry the chopper it go blakka blakka, blakka ba blakka blakka'' - Ace hood
An onomatopoeia most likely first used by The Notorious B.I.G. in his 1994 debut album (Ready to Die) song, Gimme The Loot. It's used to describe the sound of a gunshot and/or the sound(s) heard in a fight such as, Boom, Pow, Blam, etc.