A get together of people ready to go to war against "liberal lefties". Ususally meme'd as a joke by right wing people or those actively trying to keep their firearms when Democraticpoliticians go for their guns as a time when they have to defend their right to bare arms by proclaiming "Try me."
You hear how the governor of Virginia was trying to take everyones guns?!! *sigh* Time to start the "Boogaloo" again...
Of a pop culture artifact (eg: movies, TV, music, books) - for the finished product to be enjoyable for the earnestness of the creators and over-the-top style of the craft, rather than the so-called objective quality of the finished work.