A very affecting tale, esp an account of one's disabling troubles; a story that disingenuously appeals to one's charitable nature: Do not weep crocodile tears over media sob stories(1913+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with sob-story
A tale of personal hardship, true or invented, that is intended to arouse pity in the listener. For example, She always came up with some sob story to excuse her absences, but no one believed her.
[ Early 1900s