an acting of grinning
smile broadly so as to show the teeth
express by smile
Her smile broadened to a mischievous grin.
出自： H. Robbins
He had a nice, frank grin, friendly, not cheeky.
出自： A. S. Byatt
Here grins the wolf as when he died.
出自： Sir W. Scott
I can't help grinning at the funny things the child says.