A pickle is basically a pickled cucumber. Don't we describe a lot of things as "cucumber-shaped" in English?
I more often have heard things described in English as cigar-shaped.
A peb'ot is described as “torpedo-shaped” in Klingon for the Galactic Traveler. People are having fun here with the idea that the underwater ship came first, and the pickled peb'ot was named for it rather than the other way around.