When someone snools, they are being sneaky or trying to deceive someone.
Snooling is not a good thing because it means someone is not being honest.
Examples:
He snools around, trying to find out secrets.
She snools her way into getting what she wants.
The fox snools around the henhouse, looking for a way in.
The cat snools its way into the house to steal food.
He always snools to get what he wants, but it's not nice.
The spy snools around, trying to listen to secret conversations.