I wipe the cold from my eye

from Lupe Fiasco – Go To Sleep Lyrics on Rap Genius

Meaning

Coal/Cold pun. This is clarified in the next line.

“Cold” — as B.I.G. taught us on the classic track “Warning” — is slang for “eye booger”.

Lupe’s saying “cool” like in the first verse but plays with the pronunciation so that it kind of sounds like coal which would be used to heat up the “stove” in the next line.

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