Murica is a slang term for America often said in a very thick “redneck” or “hick” accent, which is used to describe and ignite extreme patriotism.
The term is used to refer to “redneckish” behaviour, often used in reaction images and memes, with someone saying something extremely dumb and patriotic.
The term Murica was first used as a term in 2003 on the forum called Democratic Underground where a user posted “Lil ol murica wouldn’t hurt a fly” as a sarcastic reaction to an earlier post that suggested the government was funding terrorism and inside jobs like car bombs and building fires outside of America.
An entry was added to Urban Dictionary in 2006, coining the meaning behind the term.
The term since then has gained huge attention, especially after the re-election of George W. Bush in 2004, where it was used to mock all the people who voted for him.
This has spawned an addition to Urban Dictionary ion 2006, which has popularised it even further, spawning YouTube compilations, countless reaction images and memes. It is a daily driver on message board websites like Reddit and 4chan.org, especially on /pol/ /b/ which are subpages of the latter site.