phonygrin
nounUK /ˈfəʊniɡrɪn/
US /ˈfoʊniɡrɪn/
A phonygrin is a fake smile that someone puts on to hide how they really feel.
She gave the photographer a phonygrin even though she was sad.
OTHER MEANINGS
2. A smile that is not sincere and is meant to trick or impress others.
His phonygrin fooled no one at the meeting.
3. An exaggerated, unnatural expression worn for a photo or performance.
The kids all wore phonygrins for the class picture.
4. A cheerful look used to cover up nervousness or guilt.
Caught with the cookie, he flashed a phonygrin.