Untrending 

Trends that are just past their prime. Often, a sizable number of people will not be aware that this has happened.

Those jeans are untrending so fast, they'll be 20 dollars in a month.

Untrending by waterygrave November 30, 2010

Preemptive unfriending 

When one deletes a friend from Facebook because he or she knows that the Facebook friend in question would eventually delete them instead. Preemptive unfriending thus robs the deleted Facebook friend of the joy of being able to delete them.

John: Why'd you delete Bec from you friend list?
Adam: I knew she'd eventually delete me so I wanted to take the satisfaction of unfriending for myself.
John: Ah, a preemptive unfriending.

Preemptive unfriending by AntonBordman August 31, 2012

unending

1) The name of the final episode of Stargate: SG1
2) An ending that leaves elements unresolved, allowing for sequels or just to shit people.
3) The usual way the second part of a trilogy ends, seeing as how most trilogies are not planned as trilogies, but seeing as how well the first did, producers and other money grabbers decide adding two more movies, books, etc. So when the time comes for an ending to the second part (seeing as how most sequels are never as good as the original) they need to give you a reason to come back for the third part.

1) "man that last episode of SG1 rocked!, despite the fact that very little was resolved, aptly named though"
2) "that was such an unending! What about all those zombies? and how did they get there in the first place!?!?!"
3) Examples include: Matrix trilogy, Pirates of the Caribbean triolgy, Halo Triolgy, etc etc

unending by MMMM, cat fud September 26, 2007

Unfriending 

Removing a person from your list on a social network site, i.e. Facebook.

We' ve been dating for months now, I can't believe she actually dumped me! -Forget her bro, start with unfriending the ho!

Unfriending by Niels81 February 4, 2009

unending torture 

Twilight Breaking Dawn: part one

"I had to sit through that unending torture the other night."

"Let me guess. Twilight Breaking Dawn part one?"

unending torture by ShadowMatt November 23, 2011

unendingly 

The state of being infinite.

Life for a true infinite being is unendingly long.

unendingly by StickOfGod October 15, 2017

Unreadings 

He runs com 😈

Unreadings runs com especially zesoa

Unreadings by slapyy on tt May 6, 2021