"cap in hand" is an idiom meaning submissively. Imagine what is going on in the lyrics, you've probably experienced it at some point in your life where one partner gets violent/angry while the other one sees this and does anything to win their favor to calm them down.
"cap in hand" is an idiom meaning submissively. Imagine what is going on in the lyrics, you've probably experienced it at some point in your life where one partner gets violent/angry while the other one sees this and does anything to win their favor to calm them down.