What does the Internet term rain mean?

Recently, the word "it's raining" has appeared on the Internet. Especially female friends will tell their boyfriends that it's "raining". So what does the Internet term "it's raining" mean? When a girl says it's raining, it mainly means that she misses you very much. It simply means she's not in a good mood, so she means it's raining. At this time, a boy might as well accompany the girl, tell her jokes, and make her happy. Generally speaking, he needs to take practical actions, and then add sweet words to get twice the result with half the effort. When a girl is in a bad mood, she can say some comforting words appropriately, such as, as long as she can be with you, there will be no problem no matter what the cost.