It is a way of also calling pig,, pork, pig, pig, pig, pig, pig or pig. It also means dirty, unscrate or rude, vulgar, ordinary,, zafio.
Piggy: m. and f. pork, animal farm: my aunt told me: "We are going to give food to the piggy and you'll see how do not do much noise ". Synonyms: Pork, marrano.