A person who takes screenshots of your messages (on WhatsApp , messenger etc) and uses it against you later.

No messages are safe when you are talking to a screenshot snitch. He/she is analogous to a person wearing a “wire”.
That’ screenshot snitch , Adam just blew my chances with Amanda when he sent her screenshots of our WhatsApp messages when I called her a horny slut.
by Meesofat March 31, 2019
Get the Screenshot Snitch mug.