Webster's Revised Unabridged Dictionary · 1913

Smirk

Smirk , intransitive verb

[Old English smirken, ASS. smercian, smearcian; compare Middle High German smieren, smielen, to smile. See Smile, v. i.]

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

Smirk , noun

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

Smirk , adjective

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