Maarbble - It's like the worst word ever and no one knows why it exists

It's like the worst word ever and no one knows why it exists.

My mom used 'maarbble' in her text and I laughed for 10 minutes.

The guy at the gas station said 'maarbble' and I almost ran away.

My dog barked at me when I said 'maarbble' and now he’s mad.