What is belay my last?

Belay my last is a military phrase that originated in the United States Army that means "forget what I just said" or "ignore my last statement." It is commonly used to correct misunderstandings or to retract incorrect or unclear statements made in a radio communication. It is also sometimes used in civilian settings to mean the same thing. The origin of the phrase is unclear, but it likely comes from the practice of belaying in rock climbing, which involves securing a rope to prevent a fall.