The nickname of the Paranthropus is "Nutcracker Man".
This nickname stems from the robust jaws and large molars of the Paranthropus, particularly the species Paranthropus boisei. These features suggest that they were adapted for consuming hard, tough foods, like nuts and seeds.
While the exact diet of the Paranthropus is still debated among scientists, the nickname "Nutcracker Man" reflects the common belief that they were specialized herbivores with a diet primarily focused on hard, fibrous plant materials.