Definitions

1. noun

a person with a serious and solemn expression, often to the point of appearing foolish or ridiculous

“The comedian’s sobersides face in the photo was a great addition to the comedy show’s promotional materials.”

2. verb

to look or behave in a serious and solemn manner, often to the point of being humorous or ironic

“He sobersides his way through the funeral, completely deadpan and without a smile.”