Over the years I’ve heard the phrase "I've got your back" used may times. As usual, I feel that I'm not in the main stream of thought, but that phrase just doesn't resonate much with me.
It makes me a little suspicious. There seems to be an implication that I've done something that requires someone to cover my back, or vouch for my alibi, or attest to my actions.
I know. I know. I'm probably overthinking this issue. I am immensely grateful for the people who are my friends, my allies, my colleagues, my compatriots. But all those folks know that I'm completely transparent. I don't do things that need "back covering." What you see/hear is exactly what you get; there for all the world to see.
And, really, those who truly “have our backs” don’t have to say it.