pig
n.— «Bad jokes flew Friday after a flurry of media reports that a pig caused a train derailment in Saginaw County’s Carrollton Township. Only problem was, the “pig” was a slang reference to a propane tank.» —“Pig stories fly after train derailment” by Cheryl Wade Midland Daily News (Michigan) May 19, 2007. (source: Double-Tongued Dictionary)
Further reading
She sells seashells by the seashore. Who is the she in this tongue twister? Some claim it’s the young Mary Anning, who went on to become a famous 19th-century British paleontologist. Dubious perhaps, but the story of her rise from seaside...
There are lots of creative names for the @, also known in English as the at-sign. In Denmark and Sweden, it’s sometimes called the snabel-a, or “elephant trunk.” In Italian, it’s a chiocciola, or “snail. In Greek...