The definition of horrible is something very frightful, dreadful or shocking.(adjective)
Sour milk is an example of something that would be described as tasting horrible.
See horrible in Webster's New World College Dictionary
Origin: ME < OFr < L horribilis < horrere: see horrid
See horrible in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Old French
Origin: , from Latin horribilis
Origin: , from horrēre, to tremble.
Learn more about horrible