To outcavilled means to beat someone in a clever or tricky way, especially in an argument or a game.
Outcavilled can make people think of being very smart or tricky, but not always in a nice way.
Examples:
He outcavilled his friend in the game.
She outcavilled her brother in the argument.
The fox outcavilled the bear in the story.
I outcavilled my sister in the race.
The little mouse outcavilled the big cat.
The clever rabbit outcavilled the sly fox.