"DB Arnold Curl" refers to a biceps exercise using dumbbells that incorporates a unique twisting motion during the curl. Named after Arnold Schwarzenegger, this curl variation starts with the palms facing the body and twists outward as the dumbbells are lifted. This movement engages the biceps, forearms, and brachialis muscles in a dynamic way, promoting overall arm strength and development. The exercise is often demonstrated with an emphasis on proper form, technique, and the benefits of adding variety to biceps workouts.