According to the all knowing WoWWiki:

  • 01:54, January 3, 2010 Coobra (Talk | contribs) deleted "MACRO in" ‎ (Speedydeleted article: content was: '{{speedydelete|not a standard command, implemented by addons only}} {{macroapi}} __NOTOC__ Delayes the commands following it. /in 15 /y Vampire Blood faded!')
  • 20:46, June 8, 2009 Pcj (Talk | contribs) deleted "MACRO in" ‎ (that's not a standard slash command)