| members on the periphery of any group, esp. political, social, or religious, who hold extreme or fanatical views. |
| lunatic fringe n. The fanatical, extremist, or irrational members of a society or group. |
Derogatory name for the extreme radical members of a group, especially in politics: “The candidate referred to the organization as being on the lunatic fringe of conservatism.” The term was coined by Theodore Roosevelt.
lunatic fringe
[IBM] Customers who can be relied upon to accept release 1 versions of software.
[The Jargon File]