DOPSA
Deleted Original Poster Strikes Again. Posted when the topic starter deletes their post, making the replies to the post senseless to people who haven't read the original post.
Person 1: How do I delete my post?
Person 2: Click the garbage tool.
(some time later, and Person 1 deletes their post)
Person 2: Click the garbage tool.
Person 3: Wha - ?
Person 2: DOPSA
Person 2: Click the garbage tool.
(some time later, and Person 1 deletes their post)
Person 2: Click the garbage tool.
Person 3: Wha - ?
Person 2: DOPSA