The person who sees that he farts loudly in his dream is interpreted that he will behave in a way that will not be welcomed in the society and will humiliate him. After this ugly behavior of the dream owner, the society will exclude him and will not want him in the community anymore.
To fart loudly in a dream is interpreted as doing wrong things, taking rights and backbiting. It means that the owner of the dream will engage in some fraudulent business that will stain his name and make his head bow, both will be discredited in the society and will be sinful.