Usage: BAN [<timeout>] [<nickname>|<userhost_mask>]
  Adds a ban affecting the given nickname or mask to the current
  channel.

  If no userhost mask or nickname is given, the list of currently
  pending temporary bans will be displayed.

  If a timeout value is entered, the ban will be removed after that
  many number of minutes.

See also:
  BANCOUNT
  UNBAN
  MODE
