Anybody know what, "one-pieced" means?

[blacklistedbully]

Obviously slang for something. Anybody know for sure?

[mcain31]

It means he knocked him out with one shot

[Op4isabitch]

Obviously slang for something. Anybody know for sure?

Term used in Lacrosse.
To check (hit) someone's stick so hard, the player accidentally drops his Crosse (stick).

[blacklistedbully]

This dude claiming he, "one-pieced" Dak is a white dude. Didn't see him in the video, but perhaps it happened before the video got started.