Lesson 24b, Exercise 3: Jennifer speaks clearly but Mike mumbles.
You mumble when you say something indistinctly and quietly, making it difficult to understand.

Watch the video with subtitles from the beginning if you like because Mike does not speak clearly. He mumbles, like many other real people.

 
Jennifer's dream job, as we see on the left, is to be a professional chef. Professional beach volley ball is Mike's dream job, as we see on the right.
Tap on any word once (mobile), or double-click on any word (computer), to read an English definition. If you need an approximate translation to your own language, the Google Translate button is available at the top of the screen.