To flewer or fleer is to smile in that grinning manner which shows all the teeth.
For, fleer as aliens would, this was the Awakening of the Red Dragon.
"It is more than men are" she said, fired, as women always are, by a fleer at the sex.
The reader who studies every line should not fleer at him who studies not at all.
And thereat they did laugh, and fleer, and shout, and ...