I love that song too. I found this and I'm pretty sure that's the meaning behind that song.
I was a quick-wit boy (I was a smart boy) diving too deep for coins (hoping for too much when I had an affair behind your back) all of your street light eyes wide on my plastic toys (but you knew about the affair and your shiny eyes had already been eyeing the old plastic bottle of pills I owned) then when the cops closed the fair (After you disappeared and the cops gave up on looking for you) I cut my long baby hair stle me a dog-eared map and called for you everywhere (I grabbed a map and went searching for you)
Have I found you? (Have I found you?) Flightless bird (the girl that refused to leave despite the pain I caused) Jealous, weeping (jealous over the girl I was with behind your back and crying) Or lost you? (Or have I already lost you?) American mouth Big pill looming (have you fallen prey to a pill-induced suicide?)
Now I'm a fat house cat (Now I'm a lonely man trapped in this world) Nursing my sore blunt tongue (cursing everthing with my foul mouth) Watching the warm poison rats cut through the wide fence cracks Pissing on magazine photos Those fishing lures thrown in the cold and clean Blood of Christ, mountain stream (as I watch rats walk through the broken fence and pee on old magazine photos scattered on the floor where there lies a stream of blood)
Have I found you? (Is this really you?) Flightless bird (the girl that never left me despite being able to?) Grounded, bleeding (Bleeding on the ground) Or lost you? (Or did I lose you?) American mouth (through that sweet mouth) Big pill, stuck going down (where that big pill got stuck going down.) Love you