Nigga so watered down
If you put him in the ground he'd probably grow plants
He’s saying the dude’s lyrics are dumbed down, and flow isn’t good as he just referenced that. When people think of something like a drink as being watered down they’re saying it’s just made up of a filler which would be the water. People don’t want it as much.
Water makes plants grow, so if he killed the rapper and put him in the ground he’s so watered down metaphorically plants would be getting all their water to grow.
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