Skid Marks On My Undies

I've got skid marks on my undies
It seems to happen to me 'bout nine times outta every ten
I got skid marks on my undies again

You see, whenever I do poo-poo
I'm overwhelmed by the terrible smell
I'm a-gagging and a-heaving
And I guess I don't take the time to wipe very well

And I end up with skid marks on my undies
If anybody saw them, I would turn red in the face
And sometimes, even after I've washed them
There's still a trace

I think I'm gonna buy a gas mask
So I can stay in the bathroom and wipe
And also keep the last meal I ate down
And the next time I take off my undies
There won't be any brown
There won't be any brown
There won't be any brown