Pretty easy given that the Oopma Loompas literally just throw in nonsense words to make rhymes. The real issue is that it’s so many syllables that it would occupy almost an entire line of the song on its own.

Oompa loompa

doopity daver

They signed the

Liability waiver

Oompa loompa

doopity date

You signed too

So it’s far too late

You signed a liability waiver, now you pay for your behavior

what a way to be a good neighbor