Lyric discussion by glassinthetrees 

Cover art for Juno lyrics by Funeral for a Friend

I read an interview with the lead singer saying that this song was about a girl who cheated on him and he was so angry at her he just wanted to hurt her really badly, and its called Juno because that is the capital of some country (alaska maybe, I've forgotten) and he felt it symbolised somewhere cold and harsh, like the state of mind he was in after he got hurt by her.

@glassinthetrees Yes, it's the capital of Alaska, Juneau.