Wiktionary
n. A journalist who writes mainly sentimental articles or has an advice column.
WordNet
n. a journalist who specializes in sentimental stories
Wikipedia
Sob Sister is a 1931 American romance film directed by Alfred Santell and written by Edwin J. Burke. The film stars James Dunn, Linda Watkins, Minna Gombell, Howard Phillips, George E. Stone and Molly O'Day. The film was released on October 25, 1931, by Fox Film Corporation.
Usage examples of "sob sister".
Lots of people wouldn't care enough one way or the other to write in and take sides with Rhoda or with her husband, but, by putting in this other stuff, there will be enough sentiment, pro and con, to bring in a flood of correspondence that will make the newspaper sit up and take notice, and it will assign a sob sister to play up the angle of the betraying husband.