fleer [fleer]
verb (used without object)
1. to grin or laugh coarsely or mockingly.
verb (used with object)
2. to mock or deride.
noun
3. a fleering look; a jeer or gibe.
I never heard the word used in that context; in fact, when I first saw it in the Word of the Day module, I first thought of the Fleer company bubblegum Dubble Bubble. It was always fun to fleer when someone was blowing a huge bubble with their gum and it burst on their face.