小气鬼是指很不愿意花钱、不喜欢和别人分享东西的人。

A 小气鬼 is someone who is very unwilling to spend money and doesn't like to share things with others.

这个词有点开玩笑或批评的意思，朋友之间也常常这么说。

This word is somewhat joking or critical, and friends often say it to each other.