I was very tired after a whole semester and I needed vacations in order to relax. For that reason, I went to a beach village, and "kafamı dinledim".
kafa dinlemek or (in other words "kafayı/kafasını dinlemek") means "to get relaxed". kafa means "head", and dinlemek means "to listen". When you put these words together, it means "to listen to (the/your) head". But as you can see, this is a special phrase. It also means that you need a quite/silent atmosphere. If someone disturbs you by making noise during your relax session, you can remind him that you need some silence by using it.
When you use this phrase, you should be careful about the personal possesive pronouns:moreRead more