That awful screech is one of the slyest things he does.
To tell the truth, human beings are the slyest and crudest of animals.
It's the slyest trick the old fox has ever tried to play on us.
Thieves are sometimes caught in their slyest tricks!
Upon my honor you are the slyest devil that ever crept out of an inkstand!
So they learned lots--and the slyest scoundrels learned the most.
The slyest of all animals have been caught in the most simple way a trap could be set, because they were hungry.
I retorted, and she smiled the slyest little smile in the world.
