Go ahead, get back in the bed
Keep sleeping, I'll be the nightmare of your dreams

from R.A. The Rugged Man (Ft. Brother Ali & Masta Ace) – The Dangerous Three Lyrics on Rap Genius

Meaning

To sleep on artists is to brush them off and ignore their efforts. So, even if you sleep on Masta Ace, he’ll haunt you with his talent. Nice wordplay with “of your dreams” to mean both literal dreams and insinuate “the most ideal for you.”

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