You are walking down the streetrocking out to music on your new headphones, someone screams, “Your headphones are so Aio!”
Your friend gets tickets to the playoffs and invites you. You shout, "You’re so Aio!”
Short for “Am I Overreacting?” People use this a lot online, especially on social media and forums, when they’re not sure if they’re reacting too strongly to something. It’s a quick way to ask others for their take on whether they’re maybe going overboard with their emotions.