A condition that occurs when one wears headphones for an extended period of time, forcing the hair on the center of one's head to be pressed down, creating the appearance of a dent in the center of one's head.
When people upload videos that are unnecessarily and surprisingly loud, even at normal volume, giving the impression that the loudness killed people who use headphones due to their proximity to the ears.
YouTube video: "Barney sings I love you"
Audio (volume X9999): "I LOVE YOU YOU LOVE ME WE'RE A HAPPY FAMILY!"
Comment: RIP Headphone Users
The result of having a conversation with someone and getting no response. Then turning around and realizing that person had his headphones on this whole time.
Mario: Yo Mike I can't believe you cut this guy from your fantasy basketball team. He's really been lighting it up lately. (Long pause.......Turns around and sees Mike listening to his headphones)
Don't ever turn your back on your ipod headphones because they will tie themselves into a friggin' knot, or bundle up like a ball of yarn in Grandma's house.