What does reincarnation mean?

It means that exaggerated humor makes people reply to messages very slowly.

Generally, you can use "I return the message in seconds, and you return the message in cycles." Other humorous sentences that make fun of the other party's slow reply message include "it must be my network card, I haven't heard from you for a long time."

There is a kind of sadness that I return your message every second and you return to me. What is more sad than reincarnation is that you can't come back at all, and so on. You send a message and I'll reply immediately. I send a message and you don't know when I will reply. The implication is that I care about you, but you don't care about me at all

This is a Buddhist term. Samsara is also called the cycle of life and death, rotation and samsara.