It's the part of the show where it all fades away
When the lights go to black and the band leaves the stage
And you wanted an encore but there's no encore today
Cause the moment is now, can't get it back from the grave

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

At the end of the concert sometime the band will come back out and play another song, sometimes not. Macklemore is using a metaphor to state that you might get another opportunity to live again tomorrow but you might not so live it like your last, you can’t get today back from the grave.

the original YOLO

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