noun.
the act of bopping haphazardly around
the internet by hitting the "stumble" button on an installed "StumbleUpon.com" toolbar added to your browser--the button will take you to a random site of interest to you (based on
preferences you set up before) that you are lead to "stumble upon" because others with similar interests liked it. "Stumbling" the internet is fast becoming an activity as
understandable to computer regulars as what simple googling is known to be.