Anti-gravititties Share definition Flag Breasts that stand up in defiance of gravity despite their size, particularly when laying down. Antonym of armpitties. "She may not have a great booty, but her anti-gravititties are so incredible I can't look away." Anti-gravititties by JoNance April 15, 2014 0 0 Get merch Get the Anti-gravititties mug. Buy Now — $32.95 See more merch