fleer

intr.v., fleered, fleer·ing, fleers.
To smirk or laugh in contempt or derision.

n.
A taunting, scoffing, or derisive look or gibe.

[Middle English flerien, of Scandinavian origin.]

fleeringly fleer'ing·ly adv.

also fleer at

verb

To smile or laugh scornfully or derisively: sneer, snicker, snigger. Idioms: curl one's lip. See express, laughter, respect/contempt/standing.

noun

A facial expression or laugh conveying scorn or derision: sneer, snicker, snigger. See express, laughter, respect/contempt/standing.

to laugh in a derisive manner: sneer

Fleer 1996