420 blaze it

[Becky]

An American phrase meaning to smoke Delta 9-Tetrahydrocannabinol (Cannabis or marijuana). Mainly used by [hoodlums].

[Sonia]

Basically, a way to say lets go smoke some pot.
This originated from Californias San Rafael High School, where there was a club that participated in marijuana (weed) smoking every day at precisely 4:20

[Rihanna]

to lite up some dank ass weed.
most of the time the dank ass weed is laced bru.

[Sarah]

Rays favourite pastime.