5channel (or 5ch and 5ch.net), its successor owned by American businessman Jim Watkins (also the owner of 8chan) WSB is a semi-outlaw investment forum ('like 4chan found a Bloomberg Terminal' as its tagline reads) that often trades high-risk leveraged options using apps such as Robinhood that have helped.2channel (also 2chan, 2ch or 2ch.net), a defunct Japanese textboard founded by Hiroyuki Nishimura.
Look up chan, -chan, channer, 4channer, imageboard, textboard, or booru in Wiktionary, the free dictionary.