A pickle was a type of food.
In 19 BBY, pickles were among the food supplies freighter pilot Nyreen Vollen used as cover story for the stormtroopers that inspected her ship Cornucopia. Unbeknownst to the stormtroopers, Vollen was hiding two Jedi, Kina Ha and Tallisibeth Enwandung-Esterhazy, aboard her ship.
The moon of Endor had a variety of pickles called swamp pickles, which were despised by most Ewoks. The Kagles, however, thoroughly enjoyed the pickles, and often purchased them from the trader Mooth.