Cut the fish into chunks and set aside.
Crush the Doritos until fairly fine and place in a large bowl (or on a plate).
In another bowl, mix the flour, paprika, cayenne pepper, salt, and pepper together.
In a third bowl, beat the eggs together well.
Dip each piece of cod into the flour mixture, then the egg (making sure to shake off any excess), and finally, coat with the crushed Doritos. Repeat with every piece.
Fry the nuggets in oil until golden brown on each side. Serve immediately.