or 4/20or 4:20
- marijuana: Are you carrying any 420 on you?
- marijuana drug use: Police presence at the concert discouraged 420.The guys at the party were all 420-friendly.
- the twentieth day of the fourth month, or the time 4:20, when referenced as a day or time for cannabis consumption or the celebration of marijuana culture: The head shop has a big pipe sale every year on 420.
Origin of 420
First recorded in 1970–75; a code word derived from the meeting time of a particular group of marijuana smokers in 1971, later popularized by fans of the band the Grateful Dead
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018