Until My Head Falls Off lyrics

There were 87 advil in the bottle now theres 30 left
I ate 47 so what happened to the other 10?
Why do you suspiciously change the subject and break my concentration
As I dump the bottle out and I count the advil up again?

Dont interrupt me as I struggle to complete this thought
Have some respect for someone more forgetful than yourself

And Im not done
And I wont be till my head falls off

Hitting every pocket on my shirt, pants and overcoat
And Im hitting them again but I dont know where I put my notes
Clearing my throat, and gripping the lectern I smile and face my audience
Clearing his throat and smiling with his hands on the bathroom sink

And when I lean my head against the frosted shower stall
I see stuff through the glass that I dont recognize at all

And Im not done
And I wont be till my head falls off
Though it may not be a long way off

Im not done talking yet
Im not done talking yet

And when I lean my head against the frosted shower stall
I see a broken figure silhouetted on the wall

And Im not done
And I wont be till my head falls off
Though it may not be a long way off
I wont be done until my head falls off

Submitted by Guest

What do you think is the meaning of Until My Head Falls Off by They Might Be Giants?