But I'm on a cloud high enough to give me a nose bleed

from Tyler The Creator (Ft. Domo Genesis & Hodgy Beats) – Up Lyrics on Rap Genius

Meaning

Either Tyler is getting a serious contact high from the hotbox (when you are at high altitudes, your nose bleeds) — or Tyler is trying to tell us about a creeping cocaine addiction (happens to the best of us..)

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