Don’t let the nerdy shit fool you dog I'm actually hard
You'll be shocked when I beat your ass, battery charge

from ForestPunk (Ft. Feat. OnnaSora) – Antigravity Lyrics on Rap Genius

Meaning

All this nerdy shit aside, I ain’t no thugged out gangster ass nigga but I ain’t no bitch though. When someone gets a “assault and battery charge” it is usually for fucken' somebody up. The punchline comes from “shocked” meaning to be amazed and also to be literally shocked with electricity. You can charge batterys with electricity. You see? Shocked when I…battery charge.

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