Translation of nipple in German

So we decided to move on. We were looking to get the next flight to Hoi Ann, which is located right in the center of the country, but we were told that there had been floods a week earlier.
We headed back to the hotel with a rickshaw, as usual in this part of the world they drove like crazy but it was hilarious. We went to sleep immediately and did not wake up the entire night.
We first took a regular bus to the border, which was basically just an empty building. There we switched to Jeeps, as the terrain was rocky. In our group there were 4 American girls and us.