Can some explain to me the term "stumble." Everyone will probably laugh, but you gotta start somewhere. Heh.
From noob to noob ... Stumble Its a reference to a service provided through the link above that is a means to attempt to increase the profile of a site. Generally in here most offer a stumble exchange ... I stumble you and you stumble me.
Stumble means that you either wants a stumble or you have stumbled someones site using the social network StumbleUpon. If you dont know about this social network, you should definitely check it out: http://www.stumbleupon.com
It is as people has said. I have written a small how to article that may help you. How to use Stumble Upon