The Brief: Shitposting means to post frivolous, random, unnecessary, or idiotic content online.

Bluesquiggle
DEEP DIVE

It can include the posting of “spam.” Shitposting is often used for the purpose of upsetting people, by inundating them with pointless, excessive content.

Reddit’s Latrine” has an extensive (and NSFW) selection of  💩posts.