I'm so damn close I can taste it

from Macklemore and Ryan Lewis (Ft. Macklemore) – Ten Thousand Hours Lyrics on Rap Genius

Meaning

He feels like his time is coming soon. He has put so much work into this game and he feels that he will go world-wide with his message and music (may also be referring to the ‘ten thousand hours’ of the previous line, the height of his potential).

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