hysterrible Share definition Flag A portmanteau word of something that is simultaneously funny or hysterical (hyst-) and awful or terrible (-terrible). Man, did you see that car full of clowns get hit by that pie-truck? Hysterrible. hysterrible by Sam (something) February 10, 2010 0 0 Get merch Get the hysterrible mug. Buy Now — $32.95 See more merch