1. A welcome relief from someone or something undesirable or unwanted.
2. An American punk rock band
3. A well known song by popular american punk/pop/punk rock (whatever you consider them) band Green Day. Many consider it one of the band's better songs but other fans would rather choose less hyped songs.
1. "get outa my town ya'l hear. good riddance!"
2. "wow Good Riddance ROCK! i love their music!"
3. "yea lyk i <3 green day && im lyk totally the biggest fan bcoz i <3 dat song "good riddance" its fair awsum!!!"