Down in the mouth
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This is a personal photo diary created in the Pandemic- Quarantine period.
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"Down in the mouth describes the state of feeling sad, depressed, discouraged or glum. The phrase down in the mouth first appeared in the mid-1600s, and simply refers to the fact that people who are unhappy are usually depicted with a frown, a facial expression that involves a downturn at the corners of the mouth". 
(www.grammarist.com)