grintracker
nounUK /ˈɡrɪn.træk.ər/
US /ˈɡrɪn.træk.ɚ/
A grintracker is a thing that keeps track of smiles.
The grintracker on the wall showed how many happy faces we made today.
OTHER MEANINGS
2. A person who notices and remembers everyone's smiles.
Our teacher is a real grintracker and always knows who is feeling cheerful.
3. A chart used to record how often someone grins during the day.
She filled in her grintracker after every joke at lunch.
4. A playful device that lights up when it detects a grin.
The toy grintracker beeped and glowed when the baby laughed.