mmm
interj. A1 Beginner mmm
interj. a sound you make to show that you are thinking or that something tastes very good.
interj. an utterance used to express pleasure, satisfaction, or a state of deliberation. Often used to signal agreement or to indicate that food is delicious.
Mmm, this cake is delicious.
Mmm, let me think about that for a second before I give you an answer.
The chef watched the critic's face, waiting for that instinctive 'mmm' that would signal the dish had met his high standards.
Usage
Often lengthened with extra 'm' characters to show more emotion or longer thinking time.