a hangdog expression
idiomatic noun phrase

- If you say that someone has a hangdog expression on their face, you mean that they look sad, and often guilty or ashamed.

Collins English Dictionary

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ANTONYMS (or ANTIDOTES) to hangdog

blissful, bouncy, bright and breezy, bubbly, cheerful, cheery, chipper, chirpy, cock-a-hoop, chucklesome, chuffed, delightful, ebullient, ecstatic, effervescent, enraptured, euphoric, exuberant, felicitous, full of pep, full of beans, gamesome, gladdened, gladsome, gleeful, glowing, happy-go-lucky, heartwarming, hilarious, in high spirits, jaunty, jolly, joyful, joyous, jovial, jubilant, merry, mirthful, of good cheer, on cloud nine, on top of the world, over the moon, Panglossian, peppy, perky, pizzazzy, radiant, rapturous, rollicking, slaphappy, snappy, spanking, sparky, sprightly, sunny, thrilled, tickled pink, upbeat, uplifting, witty, zappy, zestful, zingy, zippy

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SMUGGLE OWAD into a conversation, say something like:

“Hey Monika, did you notice Jim’s HANGDOG EXPRESSION in the telco today? Maybe we should check out if he’s feeling OK.”

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P.S. “A BIG THANK YOU” to all you blissful, bouncy, bright and breezy, felicitous “Friends-of-OWAD” for helping to keep the service running :-)

https://donorbox.org/please-become-a-friend-of-owad-2