The phrase "more down in the mouth" is a colloquial expression used to describe someone who is feeling sad or downhearted. The word "down" is pronounced as /daʊn/ and refers to a low or depressed mood. The addition of "in the mouth" suggests a physical manifestation of this emotion, perhaps a drooping of the corners of the mouth. The correct spelling of the phrase is simply "more down in the mouth," with no hyphens or other punctuation.