When someone has shiftiness, they act in a sneaky or dishonest way, like they are hiding something or doing something bad.
Shiftiness is usually seen as a negative quality because it means someone is not being honest or trustworthy.
Examples:
I don't trust him because he has a lot of shiftiness.
Her shiftiness made me suspicious.
The shiftiness in his eyes gave him away.
The cat's shiftiness made me think it was up to something.
The shiftiness of the situation was obvious to everyone.
The shiftiness of the fox was clear to all the animals in the forest.