A fork of Rural Dictionary
When somebody on the internet is talking way too much about something that is not true, and is uselessly arguing about it. The original term for this was Live Action Role Playing, A game where the players portrayed their physical appearance in the game itself.
Larping is also similar to Yapping.
Alex: Look at this dude, he's literally larping about how snails can run faster than turtles.
Leonardo: Huh, taught that meant he was playing some Role Playing game where you turn into a snail or turtle.