It is subjective to say which movie is the most disgusting in the world as different people have different tastes and preferences.
However, there have been movies throughout history that have been considered controversial or disturbing due to their graphic content.
For example, the 1972 film "Cannibal Holocaust" is known for its graphic depiction of violence and sexual content, and has been banned in several countries.
Similarly, the 2015 film "A Serbian Film" is known for its graphic depiction of sexual violence and has been banned in several countries as well.
These movies are considered disgusting by some, but others may find them to be thought-provoking or disturbing. It is important to note that movies like these are not suitable for all audiences, and viewer discretion is advised.