What does Louter mean?

"I'm doing it louter for fun," she said when someone asked about her motivation.

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

It is often used to put extra weight on something, without anything special behind it. Slightly formal, which makes it funny in casual conversations. Students love using fancy words for silly things. Also read about medium and normi.