stubbornosity Share definition Flag 1. (noun)A tendency to be stubborn. "Wow we are both stubborn people, our kids will have crazy stubbornosity." "Wow we are both stubborn people, our kids will have crazy stubbornosity." stubbornosity by Stubbornosity March 19, 2015 0 0 Get merch Get the stubbornosity mug. Buy Now — $32.95 See more merch