420chan

A place where druggies (mostly stoners) go to hang out and telling how high they are and asking for movies or help with getting high and people are at the cannabis section known as /weed/

An Image board /b/rother of 4chan containing /i/. 4chan is jealous of it's 1337n355 and tries to ruin it by posting My Chemical Romance spam. Which is pointless and a waste of time.

A nickname given from the fanbase community of the anime "Isshuukan Friends" to a supporting character called Yamagishi Saki.

420 = smoking ganja.

And Yamagishi Saki kind of gives people that vibe. Therefore she was given the name 420chan