Lumpy Space Princess' version:

These Lumps,
I know you wanna slump up on,
These Lumps,
But you can't 'cause you're a chump!

A Chuuuuuuuuuuuuuuuuuump!

Candy People's version:

These Lumps,
I know you wanna slump up on,
these Lumps,
But you can't 'cause you're a chump!

these Lumps,
so go back home, back to your Duuuuuuuuuuuuuump!