A Dong Bomb is the act of sending non-descript links or e-mails to co-workers at work, only to have the link or e-mail open to a self-shot of a naked man in a mirror thus exposing the recipient to a dong.
Co Worker: Is this link safe?
You: Of course it's safe, it's a great story!
Co Worker: Dude, thant's not safe, it's a picture of someones dong!
You: You've been DONG BOMBED!