The place that Waddo takes people to beat on (and eventually kill) any person or group of persons.
Taken from a term of American origin to take somebody to the Woodshed. Only Wadified slightly.
"Waddo took John the Wadshed."
Derives from the American term to "take somebody the Woodshed", the Wadshed is the place where Waddo takes people to beat on (and eventually kill) them.
"If you're not careful, you'll be paying a visit the Wadshed"