Often refers to actual physical location, being the last in line.

Physical Position

The phrase isn't always negative; it can just state a fact, without implying failure.

Not Negative

Understand it's an idiom; don't interpret it literally, like physically moving someone's rear.

In some contexts, it highlights a supportive or protective function, not just being last.

May imply a responsibility to ensure no one gets left behind.

Primarily used to describe someone’s position in competitive situations.

It doesn't necessarily judge skill; it could be due to chance or strategy.