Stories We Like: A Guide to the Comma
c.1300, schowten "to call or cry out loudly," of unknown origin; perhaps from the root of shoot (v.) on the notion of "throw the voice out loudly," or related to Old Norse skuta "a taunt" (cf. scout (v.2)). Related: Shouted; shouting.
late 14c., from shout (v.).
[in the musical sense, shout, ''a black religious song and dance,'' is found by 1862]