Here's a stab: #1 Hostler-the guy that services the locomotive, probably a term that started back in the days of stagecoaches and horses for the guy that was the horsehandler (just a guess), 2. Varnish-passenger cars. 3. Tallow Pot- the can of steam oil, might be a nickname for a person also but not sure. 4. Goat-??? 5. Shoe-fly- a temporary track built around a wreck or washout. 6. Dynamite-meaning the brakes in emergency. (standing next to a cut of cars that goes into emergency it is easy to see where the term comes with regard to the bang and clatter of the brake rods) 7. Triple valve-the brake control valve on a car (most NG equipment uses West. K1 triples). 8. Blue Flag- can be an actual flag, a blue lantern by night, but usually a blue metal sign that is placed on a cut of cars to indicate that men are working on or under them. Under Blue Flag protection, the piece of equipment can't be coupled to or moved untill the person who placed the flag removes it. 9. Pilot-the front most piece of the locomotive sometimes called a cow catcher, often fabbed out of old boiler tube. I think an experienced engineer who guides another engineer who is unfamiliar with the territory is also called a pilot. 10. BMT!-???no idea