Let them be what they might, the pendulum should wag, and have a fair chance of doing its best.
The hunger that possessed her made her wag her head as if senile.
He had only a stump of a tail, but he will wag it—when next his master sees him!
Say it to your dogs, however, and see if they do not wag their tails.
If he wag his tail, then will I sing; if he do not wag his tail, ...