What does Reparadler mean?

The morning after the borrel he grabbed a reparadler right away.

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

A radler is beer mixed with lemonade. It goes down as easily as soda, so students swear by it the morning after. The proof that it works is thin. It is the lighter version of the herstelbiertje. Also read about brak and hair of the dog.