mantrip
n.— « When we were ready, we loaded in to what is called a mantrip. This is the car that travels on a track and takes the miners deep into the mine. Because the ceilings are low in the mines, you have to lay back in the car so you will not strike your head on them.» —“Seeing tunnels firsthand offers fresh perspective” by Terri Richardson Journal Gazette (Fort Wayne, Indiana) Feb. 18, 2007. (source: Double-Tongued Dictionary)