The story
sour (“tart”) + corn, possibly influenced by the first element of German saure Bohnen (literally “sour beans”) and Sauerkraut (“sauerkraut”).
Etymology from Wiktionary, CC BY-SA 4.0.
sour corn
Today it means: Lactofermented pickled corn, a dish eaten in the Southern United States, especially in Appalachia. Full definition →