Shirposting

About
"Shitposting" is an Internet slang term describing a range of user misbehaviors and rhetoric on forums and message boards that are intended to derail a conversation off-topic, including thread jacking, circlejerking and non-commercial spamming. On 4chan, the byproduct of shitposting is referred to as cancer.

Origin
The exact origin of the term "shitposting" is unknown, but the earliest-known instance was submitted to the Something Awful Forums[14] on April 10th, 2007, when member OhSNAP!Tray used the expression when referring to worthless threads on the site's BYOB forum.

first known instance of use of the word Shitposting on something awful forum
Spread
On June 28th, 2007, Penny Arcade Forums[6] member IHasABucket commented in a thread about various types of electronic dance music in which he criticized other members for "shitposting."

I has a bucket accuses others of shitposting
On January 4th, 2008, Urban Dictionary[5] user jarrynkell submitted an entry for the term "shitpost."

"To make utterly worthless and inane posts on an internet message board."

On March 26th, 2010, Urban Dictionary[4] user Chunky Milk submitted an entry for "Shit Posting," defining it as the act of making an unconstructive post on an online forum.

"1: The failure to make a constructive post
2: The inability to add useful information to a forum
3: Worthless overly offensive generally racists posts written in a manner which aggravates others."

On April 27th, 2011, an entry titled "Shitpost" was created on the Internet culture wiki Encyclopedia Dramatica,[8] which listed the /s4s/ (shit 4chan says) board and the /r/circlejerk subreddit as online communities associated with the practice. On October 22nd, the /r/shitpost[9] subreddit was launched for discussions regarding low-quality posts across Reddit. On November 11th, 2012, Redditor RustledHard submitted a screenshot from a 4chan thread titled "Now this is what I call shitposting" to the /r/4chan[10] subreddit, gaining more than 3,100 up votes and 40 comments prior to being archived (shown below).

seriously a shitpost about a user claiming certain activities as qualifications for answering your questions
On August 5th, 2013, FunnyJunk[12] user Nahyon posted an expand dong-style Pokemon box art image titled "Le shitposting faic" (shown below, left). On November 6th, 2013, Redditor hardycoreman submitted an MS Paint illustration of a king standing in front of the computer titled "The Shitpost King" to the /r/Braveryjerk[11] subreddit (shown below, right).

meaningless words in a shitpost
shitpost king meme
The Independent ran an article on September 23rd 2016 about how Shitposting has grown very nuanced and that it might even help Donald Trump win the US Elections.[17]