One of the mysteries of the English language finally explained.
A type of self-service grocery store. Also in extended use. [A trademark in the U.S.]
Early 20th century; earliest use found in Printers' Ink. Apparently arbitrarily from pig + -ly + wiggly. The word was coined by Clarence Saunders, U.S. merchant and entrepreneur, who founded the company in 1916.
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