1 definition by Upside Down

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.
Joesph: “Ugh Becky dropped her phone again”

Bryan: “I know, she is such an 840.”
by Upside Down March 23, 2021
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