Comma

It's like the term "period" which indicates people are in full agreement of what you just said, but when you say "comma," that means you are interested and want the speaker to continue. You need more information. The social expectation for the person responding to "comma" is that they would contitheir sentence with a conjunction (and, or, but for, nor, yet, so) and continue their intriguing story.

Similar function to "tea" or "spill the tea."

Student 1: On Saturday, I took a shower with my socks on.

Student 2: Comma!
Student: And it was way more enjoyable than you would expect.