The Brief: Zooming is slang for being high on pills.

DEEP DIVE
Zooming refers to the euphoric, exhilarating feeling often associated with being high on molly, Percocet, or Addy.
does anybody else shudder when they see ppl with a whole ecstasy pill on thier tongue? a half pill gets me more than zooming.
— J. Grizzy aka Baby Future (@JamesGreenXYZ) November 14, 2017
While “zoom” is slang for a combination of green and PCP, “zooming” is usually used to refer to someone high on recreational pills.
Cause that Molly's got you zooming. So you just want to do it till your next flight to Houston. #hellyeah! #hollar
— Larry Gaga (@EvanWilliams91) July 12, 2012