Stuff=To fill by packing or cram, to insert, gorge,
to fill with ideas or information, etc.
However, that does not explain the choice.
For many years when becoming agitated over
ramblings, unbelievable stories or white
lies, my immediate response has been
"Oh Stuffit". It has come in handy
to overcome frustration and to avoid
less favorable language.
It seemed to fit like a glove for the boards.
Your World Is As BIG as You Make It!!!