The pig symbolizes two completely different things: on the one hand, the pig stands for uncleanness, dirtiness, mess which may predominate in one's life, but on the other hand the animal may also signify prosperity and successful businesses.
The pig is one of the dirtiest animals, leaving a mess wherever it goes, especially in its sty. This is why the 'sty' denotes a filthy and dirty place or abode. Consequently the pig, especially if seen in its sty, may stand for one's unscrupulous character.
Also, we should not forget about the fact that the pig is one of the greediest animals - therefore it could illustrate the intemperance and avarice in people.
But the pig in dreams is most of the times associated with good luck, fortune and prosperity. Seeing the pig in mud announces increasing wealth and large sums of money to be earned by the person who has the dream.
A fat, healthy pig is the symbol of opulence.
If a young woman sees in her dream such a pig, this foretells that her future husband is going to be jealous and driven by avarice, but he will offer her a wealthy living.