I ain't gotta clap at 'em, niggas scared of that black

from Jay Z – Dirt Off Your Shoulder Lyrics on Rap Genius

Meaning

Jay doesn’t have to take shots at other rappers because they respect him to the point where they’re scared of the shots in the first place.
Jay uses a double entendre for black he punctuates his line with the word by using it as someone uses it as in what up “black”? or “homie”? and black gun that “claps” or shoots.

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