Sometimes when I am looking at peoples profiles I see "Referrals" Down the bottom of the page. I am wondering what is a referral?

Simply put, it's pretty much "directing someone to join the site."

So how could I get one?

well there was a site called "on.toribash.com" where u could register your account.
then u got a link with your acc. name in it. if someone else press this link he will gets linked to the starting page from toribash. the one who sent the link even gets tc for that!
its just to get new people.
if u send a friend this link, he registers and downloads over it u reffered him. much sites got this function with little bonus if u make it succesfully.

but the site to register your account doesnt works anymore since a few months. but people which registered before will still have their link.
http://blubkill.on.toribash.com/ like me ;)