Stumblr 

The act of using stumble-upon to find pictures to post on your tumblr account.

I was totally stumblring and found a picture of a cat with a hat!

Stumblr by RadishDog123456789 January 21, 2011

Stumblr 

someone who is a stalker on tumblr, one who stalks other tumblr accounts and claims that he/she happened to stumble across a tumblr account accidentally.

friend: why are you always checking out his account?
stumblr: no, i accidentally clicked on his account

friend: what, you clicked on his account for 20 days straight "accidentally" , you're a stumblr

Stumblr by _kickinthedick June 1, 2016

Stumblin

The act of being so fucked up you can't see or walk straight, therefore you stumblin.

"Damn man, that shit last night got us fuckkked up!"
"Yea bro, I was stumblinnnn!"

Stumblin by Siyksoul December 22, 2009

stumbleine 

A hopeless, dreamy, yet clumsy girl who is somebody's sweetheart. She is gentle and she is loved.

"Amy has become quite the stumbleine now she's finally found a boyfriend"

stumbleine by WiseOldTabbyCat April 4, 2008

Stumbler's Syndrome 

A syndrome in which chronic users of stumble upon (involuntarily and out of habit) click the bottom left of the task bar when accessing the internet on web browsers that do not have stumble upon installed.

Why are you clicking on the favorites button?

What?... Oh sorry, I have Stumbler's Syndrome.

Stumbler's Syndrome by Corey Eeeeeeeeeeeeeeeeeeeeeeee February 25, 2009

stumblebomb 

(v.) Repeatedly sending inane websites dozens or hundreds of times, often in conjunction with accompliaces, to a StumbleUpon user so that it becomes all but impossible for him to surf the sites he wants to.

It took me two hours to get through those pages after those dudes stumblebombed me.

stumblebomb by Dylan "DaShizz" July 7, 2008

Stumble puff 

A transient doper stumbling through the area looking for free drugs.

Me: hey, what is that stumble puff doing?
You: looking for a free puff, duh!

Stumble puff by QueenyOmygodess April 1, 2017