You mean like this:
I did that by copying the URL from the bar at the top of the browser
That's the profile - what's the problem?
The URL in simple terms is the address for the particular profile page. Any web page has a URL.
For example, this discussion is at http://www.geni.com/discussions/89841
You should see that at the top of your screen somewhere - perhaps also with a message number. That's where you will find the URL when you view a profile page. Quote the URL and everyone will know unambiguously what profile you are referring to.
Or if you start a discussion directly from a profile page, a link to that profile will appear on the discussion page.