When you have your earphones on and are singing to the music but those around you can only hear you.
John was listening to Elton John's "Your Song" on his headphones but you could only hear him...skareoke!
A term used for a karaoke game where participants pick difficult or embarrassing songs and put them on slips of paper. All the slips are put in a bucket, and the songs for the participants are randomly drawn by the KJ, so they don't know what they are going to sing until they get up to the mike.
When we went out to the bar we played skareoke, and Bill ended up singing "Barbie Girl".