When, after puffing on a beefy spliff, you totally zone out whilst listening to your iPod. In this state, you will not acknowledge the world around you or any people trying to communicate to you. It's awesome... :)
Ahmed - "Dude, I'm so high... what's up with Keiran?"
Mark - "Oh, he's iPod stoned. He's been dancing in cirlces and singing for 10 minutes"