A musicoholic is a person who's life revolves around mucic. If you listen to mucic in the shower, whil'st sleeping, while eating, or just plain listening to music while doing nothing, if you do all of the above, you are a muscioholic. You think about musci all day, you think about listening to it, going to concerts, buying a CD. Everything you do has music involved in it.
"I woke up to the darling sounds of radiohead, got up and listened to some foo fighters whil'st brushing my teeth then listened to some bowie while eating breakfast before going to the CD store, my friends call me a musicoholic."
LOL.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.