Spontainiality Share definition Flag spontainious personality, someone who is random, something that is random, an unpredictable person/thing. "He/She is full of spontainiality". "I love spontainiality". "Spontainiality is a way of life". Spontainiality by Weezbly July 25, 2007 0 0 Get merch Get the Spontainiality mug. Buy Now — $32.95 See more merch