SLIPPY Meaning of SLIPPY in English — slippiness , n./slip"ee/ , adj., slippier, slippiest . 1. Informal. slippery. 2. Chiefly Brit. quick; alert; sharp. [ 1540-50; SLIP 1 + -Y 1 ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012