From Team Fortress Wiki
The B-ankh! is a miscellaneous item for the Scout. It is comprised of a set of mummy bandages wrapped around the Scout's arms, as well as a golden Ankh medallion that replaces his dog tags.
This item can only be worn around Halloween or during a Full Moon; at other times of the year, it does not appear in gameplay, unless the server has Halloween mode enabled. However, it can be equipped at any time and can still be viewed on the loadout screen even when it is not visible during games.
October 27, 2011 Patch (Very Scary Halloween Special)
- The B-ankh! was added to the game.
February 9, 2012 Patch
- [Undocumented] Added "necklace" region to the B-ankh!
- The Ankh is an ancient Egyptian hieroglyph symbol that means "eternal life", and can be seen as a pendant worn around the Scout's neck.
- The name of this item is a portmanteau of the word Ankh and the Scout's popular "Bonk!" catchphrase.