Smirk

Part of speech: noun (n.)

A forced or affected smile; a simper. The bride, all smirk and blush, had just entered. Sir W. Scott.

Part of speech: verb (v.)

To smile in an affected or conceited manner; to smile with affected complaisance; to simper.

Part of speech: adjective (a.)

Nice,; smart; spruce; affected; simpering. "So smirk, so smooth." Spenser.