Even though the library was supposed to be quiet, Jake kept motormouthing his opinions to anyone who would listen.

During the long road trip, two motormouths in the backseat kept everyone awake with their nonstop stories.

At family dinners, my motormouth cousin tells stories non-stop, leaving everyone both amused and exhausted.

When she gets nervous, she motormouth and never seems to catch a breath.

Our motormouthed neighbor interrupted every conversation with a stream of loud, irrelevant anecdotes.