If you holler, you shout loudly. The audience whooped and hollered `Watch out!' he hollered Cal hollered for help = shout, yell Holler is also a noun. On the ship's deck, after the whoops and hollers, the butchering begins. Holler out means the same as holler. I hollered out the names I heard him holler out, `Somebody bombed the Church.'. to shout loudly = yell holler at (hollo (16-19 centuries))