What is A Dangler?
An area of an email or a section of an email that should be deleted prior to forwarding or showing but is not. Instead it becomes a dangler, and hides in the body of the forwarded email until it is read by someone who will be unintentionally affected by it.
Oh man, we just got busted by
a dangler. When I forwarded Shannon that thread we had going last week, I forgot to delete that section where you said she had a giant booty. Sorry!