This article examines cultures of anonymity (or ‘nonnies’) and secrecy in online slash fandom through textual analysis of fannish reaction to gay magazine DNA publishing slash content. I use the experiences of infamous slash manip artist mythagowood from the Supernatural fandom community to read this critical moment of online discourse creation. Specific cases on LiveJournal communities spnanonhaven and fandomsecrets are examined to reveal pockets of conservatism, or ‘pearl clutching’, online. Within the context of male slash production, I examine the implications of nonnies and their efforts to keep slash secret, which is the enactment of an online ‘slash closet’; and conclude by considering what cultures of anonymity and secrecy mean for male slashers, many whose slash practice is inextricably linked to direct identity construction.