Simper

Part of speech: noun (n.)

A constrained, self-conscious smile; an affected, silly smile; a smirk. The conscious simper, and the jealous leer. Pope.

Part of speech: verb (v.)

1. To smile in a silly, affected, or conceited manner. Behold yond simpering dame. Shak. With a made countenance about her mouth, between simpering and smiling. ir. P. Sidney.

2. To glimmer; to twinkle. [Obs.] Yet can I mark how stars above Simper and shine. Herbert.