flat sour

noun

1. fermentation occurring in canned foods after sealing.
2. canned food so fermented.

Word History and Origins

Origin of flat sour¹

First recorded in 1925–30

Example Sentences

"Flat sour," perfectly harmless, appears often with inexperienced canners.

From Project Gutenberg

"Flat sour" affects peas, beans, asparagus and corn more than other vegetables.

From Project Gutenberg

However, the taste and odor are so disagreeable you will have no desire to eat "flat-sour" canned goods.

From Project Gutenberg

Flat-sour often causes annoyance to beginners in canning some vegetables, such as corn, peas, beans and asparagus.

From Project Gutenberg

This "flat-sour" is not harmful and must not be confused with "botulinus," which is harmful.

From Project Gutenberg