I shall aptly say that Fling is the new Relationship, since JZ (you should go browse his blog, very quirky writing) and many more blogger has used a similar phrase in a varied context. If I can so nicely put it that relationship is so hard to come by (perhaps it has something to do with good men are hard to come by too). According to Wikipedia, fling can be defined in three manner:
[1] the Struggle Front for the National Independence of Guinea. Nope… not me.
[2] a song by Built to Spill from their 1994 album There’s Nothing Wrong with Love. I will not write another full page on what is wrong with LOVE.
[3] two people or a group of people have intercourse. Ahh.. more like it. =)