gistfile1.rb

#!/usr/bin/env ruby

require "rubygems"
require "summer"

class Bot < Summer::Connection
  def channel_message(sender, channel, message)
    return unless message =~ /^\.lmgtfy\s+(.+)$/i
    privmsg "http://lmgtfy.com/?q=#{URI.escape($1)}", channel
  end
end

Bot.new("irc.freenode.net")