it's not made up.
The Tomahawk Steak is a Bone-In Rib Steak with the entire rib bone intact. This long bone is frenched (trimmed of meat and fat), leaving a beautiful presentation piece. The Tomahawk, being a Rib Steak, has the largest amount of intermuscular fat, making it the most flavorful steak. The Tomahawk is cut based on the thickness of the bone and is typically two inches thick. One Tomahawk can easily feed two people. The Tomahawk is cut from the rib section. The primary muscle of the Tomahawk is the longissimus dorsi, which is also the primary muscle in the Porterhouse, T-Bone and New York Strip.