ETA: There is now a third thread, so send new comments there.
Since the first thread has exceeded 500 comments, it seems time for a new one, with Eliezer's just-posted Chapter 33 & 34 to kick things off.
From previous post:
Spoiler Warning: this thread contains unrot13'd spoilers for Harry Potter and the Methods of Rationality up to the current chapter and for the original Harry Potter series. Please continue to use rot13 for spoilers to other works of fiction, or if you have insider knowledge of future chapters of Harry Potter and the Methods of Rationality.
A suggestion: mention at the top of your comment which chapter you're commenting on, or what chapter you're up to, so that people can understand the context of your comment even after more chapters have been posted. This can also help people avoid reading spoilers for a new chapter before they realize that there is a new chapter.
It's short for "relationship", but it's also used as a verb, which means to portray or want two (or more) characters to be romantically and/or sexually involved.
Examples:
"I ship the Whomping Willow and the Devil's Snare." = "I am amused by imagining those two plants in a relationship" or "in at least one derivative creative work, I have represented those two plants as being in a relationship."
"This fic contains only canon ships." = "This work of fanfiction romantically pairs characters in the same arrangements they have in the source work."
Ahh, thanks for the explanation. It took me a few posts to become confident that A/B was referring to romance and I didn't notice the abbreviation and verbating of 'relationship' at all.