This was written for niggas who wouldn't give me dap
Niggas who told me that I had sissy rap

from Hopsin (Ft. SwizZz) – I Am Raw Lyrics on Rap Genius

Meaning

“Giving dap” means both “Pounding fists as a handshake” and “Giving props/respect”. He’s basically saying that this song is indicated towards everyone who didn’t respect him when he was coming up in the game.

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