Joshin Share definition Flag It pretty much means "im jokin", "jokin" and "playin with ya".This term is most used in California. Dude, you look like a f**cked up monkey. Haha, im just joshin..........but seriously you should something about your face. Joshin by Yazziiii February 5, 2010 0 0 Get merch Get the Joshin mug. Buy Now — $32.95 See more merch