To inhale and exhale the fumes of burning cannabis plant material at a rate approximately double that of the average consumer (see: 420)
Neophyte: Excuse me, my good stoner, but how, specifically, might one "840"?
840 Veteran: JUST SMOEK WEEED TWICE AS HARD!!!!111
840 Veteran: JUST SMOEK WEEED TWICE AS HARD!!!!111
by Penis McGloff September 18, 2008

by DON COLAMECO! June 13, 2007

by GaMeRuInEr May 02, 2006

The oldest form of RoomieOfficial lore. Simply put, 840 is someone who drops their phone. It can also be used to describe someone who smokes marijuana excessively, as 840 is 420 doubled.
by Upside Down March 23, 2021

by Masta Rolla July 17, 2013

When an individual gets so high he reaches the
spiritual point in which he is double high- double 420
spiritual point in which he is double high- double 420
by Soda Caps November 23, 2021
