Indicates that the outcome is the same regardless of whether the action happens or not. Combines V-건 (conditional "whether") with 말다 (to not do) + 건 to form "whether X or not X".

• •Indifference: "비가 오건 말건 갈 거예요" (Whether it rains or not, I'll go)
• •Dismissive: "네가 믿건 말건 사실이야" (Whether you believe it or not, it's true)