cowcatcher
noun
cow·catch·er ˈkau̇-ˌka-chər 
-ˌke-
: an inclined frame on the front of a railroad locomotive for throwing obstacles off the track
Did you know?
New Jersey's Camden and Amboy Railroad was the first in the U.S. to adopt the cowcatcher, adding it to its John Bull locomotive in the early 1830s. But, as the Model Railroader Cyclopedia warned, "don't ever let a railroad man hear you use 'cowcatcher.'" In its heyday, railroad workers preferred the name pilot for that v-shaped frame. In the 1940s and '50s, cowcatcher jumped the tracks and took on a new life in TV and radio advertising jargon. The term was used for a commercial that was aired immediately before a program and that advertised a secondary product of the program's sponsor. Such ads apparently got the name because they "went in front."
Example Sentences
Recent Examples on the Web The lights will go instead under the heavily customized front grill, which on the original vehicle was the size of a locomotive's cowcatcher. 
Jesse Leavenworth, courant.com, 27 July 2017 Equipped with towing equipment, a jack, an air compressor, spare gas and a massive cowcatcher-like steel front bumper, the response teams’ priority, after safety, is clearing the roadway quickly. David Gutman, The Seattle Times, 19 June 2017
Jesse Leavenworth, courant.com, 27 July 2017 Equipped with towing equipment, a jack, an air compressor, spare gas and a massive cowcatcher-like steel front bumper, the response teams’ priority, after safety, is clearing the roadway quickly. David Gutman, The Seattle Times, 19 June 2017 Word History
First Known Use
1838, in the meaning defined above
Kids Definition
cowcatcher
noun
cow·catch·er ˈkau̇-ˌka-chər
: a strong frame on the front of a railroad engine for moving things blocking the track