Definition

The deliberately informal, often satirical pronunciation of 'America' used to mock excessive patriotism, jingoism, or stereotypical American behavior. Usually accompanied by references to guns, eagles, and freedom fries, it's the linguistic equivalent of wearing an American flag tank top to a monster truck rally. Originally meant as mockery, it's been ironically embraced by the very people it was meant to ridicule.

Example Usage

He showed up to the barbecue in a stars-and-stripes speedo yelling 'Murica!' while shooting fireworks.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=murica&defid=11786392)