oh come on, there's only about four people on here who know what they are anyhow...
There will be more now: http://www.urbandictionary.com/define.php?term=Sheriff%27s+badge
@Platini started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
There will be more now:
http://www.urbandictionary.com/define.php?term=Sheriff%27s+badge