cowcatcher

noun

1. A plough-shaped device affixed to the front of a locomotive (or other large vehicle), usually wedge or V-shaped so as to push or deflect objects on the tracks out of the way, to clear out the train's path and prevent the risk of derailment or major damage to it.“With its long tapered cowcatcher, massive headlamp and enormous diamond smokestack behind, wagon-top boiler, high running-plate above the driving-wheels reached from a front door in the square side-window cab, cylinders with slide valves mounted on top, and double bogie tender, General in its present form is typical of much earlier American locomotive practice.”
2. An advertisement at the start of a program.“Hitchhiker and cowcatcher plugs will be considered.”