Shel Silverstein - Boa Constrictor

Oh, I'm being eaten
By a boa constrictor,
A boa constrictor,
A boa constrictor,
I'm being eaten by a boa constrictor,
And I don't like it--one bit.
Well, what do you know?
It's nibblin' my toe.
Oh, gee,
It's up to my knee.
Oh my,
It's up to my thigh.
Oh, fiddle,
It's up to my middle.
Oh, heck,
It's up to my neck.
Oh, dread,
It's upmmmmmmmmmmffffffffff . . .

Shel Silverstein

http://www.poemhunter.com/poem/boa-constrictor/