Carter’s secret nickname in Yellowstone is “Chubby.” He’s also referred to as “Boy” in some behind-the-scenes and fan references, but “Chubby” is the nickname most directly tied to the character’s backstory and on-screen lore.

Quick Scoop

  • Main nickname: Chubby.
  • Other informal label: Boy.
  • Why it matters: It comes up as part of Carter’s rough upbringing and character history.

What fans mean

Some viewers use “secret nickname” to mean a name that isn’t always said openly in the main storyline. In Carter’s case, “Chubby” is the one most often identified in character references and fan discussion.

In context

Carter is introduced as a troubled teen who gets taken in by the Duttons, so the nickname fits the show’s habit of giving characters rough, personal, or ironic labels. That’s why fans keep bringing it up in discussions and recap posts.

TL;DR: Carter’s secret nickname is Chubby.