What does Thuisthuis mean?

At weekends he always went back to his thuisthuis for a proper hot meal.

Dutch student slang. This is a Dutch word. You will hear it a lot at Dutch universities, student associations and in student houses.

The word exists because thuis is already taken by the student house. Thuisthuis is where the fridge is always full and someone does your laundry. Many Dutch students go there every weekend. Also read what THTH means.