Haitian happiness n. severe diarrhea or dysentery. Editorial Note: Many other terms for diarrhea are constructed with quickstep or (the) trots, such green-apple trots or Saigon quickstep, according to the Historical Dictionary of American Slang. Others include Montezuma’s revenge, the screamers, and the shits. (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...
Another slang for Haitian Happiness, the shits etc, is Hershy Squirts. You forgot the best one of all! Someone has to add it to the editor’s notes.