stumbleupon 

a website where people share their websites and send the pages they visited to each other

Man i was on this cool as site just now!I sent it to you on stumbleupon,you got it yet?

stumbleupon by stevoo0011 July 27, 2006

stumbleupon 

A tool for Mozilla Firefox that is used for trolling at the speed of light.

I use stumbleupon every day! In fact, I use it a thousand times a day!

stumbleupon by That One Italian June 25, 2010

stumbleupon 

(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.

stumbleupon by Riddlze November 1, 2009

Stumbleupon Saturation Point (SSP) 

v. and n.

When using the tool, Stumbleupon on a slow work day and you have 'Stumbled' so many times that:

1. You are actually sick of the internet;

2. All the pages are beginning to look familiar;

3. You're clicking next out of habit and aren't even looking at the computer screen any more.

Roopy: Lola, you look tired and depressed.

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.

Stumbleupon Saturation Point (SSP) by BahumBugg April 23, 2011

StumbleUpon Done Got Me!

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!!"

StumbleUpon Done Got Me! by Maddmatt4life June 17, 2011

stumbleuporn 

To stumble solitarily on the pornography section of stumbleupon. Ideal for maximizing your pornographic potential on the interwebz

Last week I returned home to find my grandmother stumbleuporning on my computer and was quite shocked that she asked me how to make her own account

stumbleuporn by OG StumbleUPorner November 18, 2010

stumble upon 

stumble across, to encounter or discover (someone or something) by accident

after 28 yrs of mis direction i stumble upon taoism n it changed my life forever!

stumble upon by annua August 8, 2009