chucknorrisuarisrex Share definition Flag The reason the dinosuars went extinct. Widely believed to be the biggest land animal of all time "RUN A chucknorrisuarisrex"! chucknorrisuarisrex by roflcoptor October 1, 2007 0 0 Get merch Get the chucknorrisuarisrex mug. Buy Now — $32.95 See more merch