I wipe the cool from my eye

from Lupe Fiasco – Go To Sleep Lyrics on Rap Genius

Meaning

Homage to The Notorious B.I.G.’s wake-up routine on Warning, except Lupe’s also saying “I wipe the cool from my eyes”

He means he’s wiping ‘The Cool’, his second album which he admits was underlaid with a lot of darkness and sorrow. He’s implying that he’ll be taking a different route for Lasers, the follow up album to ‘The Cool’

Could possibly be kohl, like the practice of Prophet Muhammad(SAW) used to put kohl in his eyes before he went to sleep.

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