How do you spell tootle lu meaning is goodbye?

There is no known word or phrase that spells "tootle lu" and means goodbye.

It's possible you've misheard or misremembered a phrase. Could you provide more context? For example:

* Where did you hear this phrase? (Movie, song, book, etc.)

* What language is it supposed to be?

* What other words are around it?

Knowing more about the situation might help identify the correct word or phrase.