YSIT Share definition Flag Acronym, Young Slut In Training, Young women in over-the-top, in your face, slutty attire. She looks like Brittany Spears without the millage, a true YSIT. YSIT by Zahang October 9, 2011 0 0 Get merch Get the YSIT mug. Buy Now — $32.95 See more merch
