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.
by AntonBordman August 31, 2012
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Someone who has blocked you in all social media but still enjoys hooking up with you.
Angie got fed up with my posts on Facebook so she blocked me. She still calls me over for the dick so i call that an Unfriend With Benefits.
by Gerswon March 7, 2014
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To partake in a systematic unfriending of people on FaceBook on their birthdays.
Lisa: "I've got to wish these 8 people a happy birthday. But if I birthday unfriend, I only have to do 5."
by porkchchoppanzeefin November 28, 2018
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To accept a friend request on social media websites by people
who's profiles are marked private or "for friends only", with
the intent of checking out their profile pics and immediately
"unfriending" them based on the gut feeling you had by seeing
their initial profile pic. This also can come about via friend
requests from long lost friends or exes.

The underlying motive is that these people who get
"Pre-unfriended" won't notice that their friend request is
missing and not rejected.
Lisa, "Diane, check out your ex-high school boyfriend trying
to friend me."
Diane, "Eek! That's Eric, totally gave me the creeps on prom
night. Pre-unfriend him and move along!"

Tony, "Man, this chick can't take a hint Scottie! I have
Pre-unfriended her 7 times and she's friend requesting
me again!"
by Whaaaaaat? January 26, 2012
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An offensive act perpetrated by a social networking site "friend" that results in permanently unfriending the individual.

Unfriendable Offenses can include, but are not limited to:

1. Excessive postings about children
2. Excessive postings about health and children's health
3. Postings about every, ever-loving thing that you do
4. Unwarranted sexy talk via chat from a former classmate who is currently married with three children
Rod committed the worst of all unfriendable offenses; I asked him about his wife and kids and he told me what he was doing to his penis.
by tampa_girl_33611 April 28, 2010
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When someone you're friends with on a social network takes too much of an interest in their profile (generates an excessive amount of posts) or in your profile (generates an excessive amount of comments on your profile), and you contemplate terminating the "friend" status.

Contemplation can also be due to terminated relationships, etc.
Girl 1: Oh my God... Becky is so annoying on Facebook. She comments on like, ALL of my pictures.

Girl 2: I know, right! Right now she's Pending Unfriending.
by chocoprincess116 July 29, 2012
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People you play multiplayer speedruns with
"yo i gotta play 8 player pico park better get my unfriends"
by dummyville January 14, 2022
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