(N) 1. Stumbleupon is an internet sea of feminine passive-aggression, trolling and insanity. An ideal forum for internet tough guys, pretentious bitches, would be political pundits, old women and shitty poets to sound off. Members of the 'core forums' aren't well known for having much going on with respect to interpersonal skills, as is evidenced by their endless hours spent online.
2. A place for douche bags too old for 4chan to hang out.
3. A web browser utility used for trading kittens photographs, smut, and astronomical photos amongst 'friends', who are generally people you wouldn't spend a minute with in real life.
I joined Stumbleupon, but hated the experience. It's like facebook for wordy douche bags.
Lola: I had a slow day at work today, so I used Stumbleupon for 6 hours straight and I might murder something if I see another Cyanide and Happiness comic strip.
Roopy: Ouch, looks like you've hit Stumbleupon Saturation Point (SSP). Go read a book for a few days, you'll feel better.
When utilizing StumbleUpon (With porn topics enabled), one may hit the "Stumble" button, be distracted by a friend/barking dog/TV, and glance back at screen only to greeted by extreme acts of porn unexpectedly. Thus, provoking a noise such as, "Whoa!"
(As Justin Stumbles) Toby:"HOLY SHEEP SHIT, JUSTIN!! THE LIVING ROOM'S ON FIRE!!!"
Justin: "Toby, what the hell are you yelling about?! All's well, you're just tripping man. I'm gonna get back to Stumbling...... WHOA, THERE 4 DUDES AND A GRANNY ON MY SCREEN!! STUMBLEUPON DONE GOT ME!!"