When a bunch of creators copy a popular video word for word to get views and likes.
Jimmy makes a funny video saying "ask your crush out on April Fools, so if they reject you, you can just say it was a joke", then Michael sees all those views and decides to copy the video word for word, except with his face this time. Then Bob sees it and copies it, then Fred sees it and copies it, and so on. So when you scroll on tiktok and see a funny video thats the exact same as the one you saw yesterday, but with a different creator; you can comment "shareslop."
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.