What does it mean to be old and the deer in my heart is still bumping?

"Deer bump into each other" is an idiom to describe a person who feels very excited, excited and uneasy, just like a deer bump into each other. This idiom can be used to describe various emotions, including love, excitement, tension and so on.

The origin of this idiom is interesting. It first appeared in the novel The West Chamber in the Ming Dynasty. It describes that when Zhang Sheng first met Cui Yingying, he felt very excited, just like a deer bumping around. Later, this idiom was widely used by everyone and became a common language to describe emotions.

In short, the idiom "bumping into a deer" describes an emotional state of excitement, excitement and tension, which is also shared by people of a certain age, so there is nothing wrong with this expression.