Place a large skillet over medium-high heat. Add the ground beef and cook, breaking it apart with a spatula, until entirely browned and no pink remains (about 5-7 minutes).

Carefully drain any excess fat from the skillet.

Cut the processed cheese into 1-inch cubes.

Reduce the skillet heat to medium-low. Add the cubed cheese and the entire can of diced tomatoes and green chiles (do not drain the can) to the browned beef.

Stir the mixture continuously until the cheese is completely melted, combined with the beef and tomatoes, and smooth (about 5-8 minutes).

Remove from heat and serve immediately with sturdy tortilla chips.