Billions of Brain Cells Ago

Billions of brain cells
Billions of brain cells ago
They’re dead and gone – alas, alack
The victims of a sneak attack
Oh, how I wish I had them back
The things I used to know
Billions of brain cells ago

There’s so much I’ve forgotten . . . .
Lalalalalalala
My lights are dim, my lobes are lame
I know I’ll never think the same
But at least they didn’t die in vain
The things I used to know
Billions of brain cells ago

Hic, haec, hoc
This brain is such a joke
Fee fi fo fum
I wasn’t always this dumb

Billions of brain cells
Billions of brain cells ago
It truly is a scary sight 
To see your brain cells burning bright
But ah, they give such lovely light . . . .
The things I used to know
Billions of brain cells ago

Trillions and zillions and quadriquintillions 
Times billions of brain cells ago.