butt-uping Share definition Flag The act of laying on your back on a bed while feet are touching the ceiling. Hey Bre watch, I can do a butt-up and touch my feet to the ceiling! lets call it butt-uping butt-uping by Brallie January 21, 2013 0 0 Get merch Get the butt-uping mug. Buy Now — $32.95 See more merch
