I'm clocking three past six and going postal

from Tyler The Creator – Yonkers Lyrics on Rap Genius

Meaning

“3 past 6” = a 9 millimeter gun, which he can use to “go postal” which has become a euphemism for going on a shooting spree. Notable clock wordplay involving the phrase clocking three past six.

Above, it’s 4 past 5.

Also, “3 past six” could mean “3 sixes,” or “666.” This wouldn’t be uncommon for Odd Future.

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