1. A phrase, word, or sensation on the internet
2. A phrase, word, or inside joke in your social group on the internet or irl; you have to be there, can't easily be explained.
1. Stop trying to make that meme a thing. It's never going to be a thing.
2. "Man I am hungry as shit." "What is that?" "It's a thing my friends and I did a while ago. You had to be there"