One of my friends every day used to send me a embarrassing video on my wall. I asked him why? He said that he is not sending it intentionally, it is spreading automatically.  He cant get rid of it even after removing all applications. So he gave me his credentials to me to solve the problem. I have solved his problem in the following way.

1. I logged in facebook through his credentials.
2. Went to privacy setting by clicking the right top corner arrow.
3. Clicked on Edit settigns of “Apps and Websites”  block.
4. There are 2 links in “Apps you use” block. They are Remove unwanted or spammy apps and Turn off all apps.
5. I clicked on first link and saw there was no apps to remove.
6. then i clicked on second link and get the list of apps one of them were spamming.
7. I simply turned off the app.

My friend and all of his friends got rid of the embarrassing app. Happy ending.