1. Like being cool, only more so.
2. Used as adj.; cool, only more so.
3. n. An oriental ethnic group; reknown in the western U.S. for working in near-slavery conditions to do the hard part of building the first trans-continental railroad.
4. n. An offensive racial, (see race), slur against oriental people.
2-3. After the coolies finished the project, it must have been real coolies to have a trans-continental railroad.
4. I doubt they ever let the coolies ride on it.