There are several synonyms for the phrase "dancing pig" that could be used in different contexts. One possible substitute could be "prancing swine," which conveys the image of a pig frolicking joyfully. Another option is "jiving hog," which adds a playful tone and suggests a pig with rhythm. For a more comical twist, "grooving boar" could work, highlighting the animal's wild and carefree nature. If the emphasis is on the pig's physical movements, "shimmying sow" might be suitable. Ultimately, the choice of synonym will depend on the desired effect and tone, but there is certainly no shortage of creative options to choose from.