grinning

Verb

 * I’m grinning because someone told me a joke.
 * I’m grinning because someone told me a joke.

Noun

 * 1) The act or expression of one who grins.
 * 2) * 1835,, History (essay in the Edinburgh Review)
 * The agitations resembled the grinnings and writhings of a galvanized corpse, not the struggles of an athletic man.