Unstable Character Design 

When a specific character from an animated series or TV show can have obvious but not permanent changes to their look such as: hair style or color, clothing, glasses or other accessories.

Princess Bubblegum from Adventure Time has an Unstable character design.

Unstable Character Design by Maxamagican June 6, 2020

the unbearable lightness of genius 

the unbearable lightness of genius is an affliction that affects only one person in the entire population of earth and this person is a guy named Seán (who is also affected by the unbearable lightness of awesomeness too but that's for another day)

when Seán woke that morning he was suddenly overcome by the unbearable lightness of genius...he knew that Wordle didn't stand a chance that day. unrelated... he also looked super hot.

the unbearable lightness of genius by dats wight wabbit April 3, 2022

emotionally unstable

Intense mood swing;
A minor event may trigger an extreme emotional outburst.

Emotionally unstable; Jake didn't invite me to the party... He hates me and so does everyone else.

emotionally unstable by café February 17, 2015

Uneffable 

Someone who is so indescribably unattractive that it is impossible to fuck them.

"I've thought about it dude, but she isn't just ugly, she's mean. Totally uneffable."

Uneffable by Matty B Good May 19, 2009

Unstable_Day 

1. A popular Operative in The Days Union 2. Clearly has rabies 3. S h o r t . 4. He is the cyan Operative. 5. A dysfunctional-twitchy existence.

Person 1: Unstable_Day is so cool!
Person 2: He's literally a-
Person 1: UNSTABLE_DAY IS SO COOL.

Unstable_Day by Days Union <3 December 6, 2021

Unhateable 

1. A person that is soooo amazingly awesome that no matter how much effort is put into hating them that person can not be hated

2. Being so loveable that even if one were to try to hate the unhateable person, it would be impossible because something about them makes everyone like them

1. Ashley Starnes is unhateable to Nathan Poore; he could never hate her.

2. I love Ashley! I don't know how anyone could hate her; she's unhateable!

Unhateable by luvdisgrl! July 1, 2011

undatable

not able to be dated at all

the writer of this definition is undatable

undatable by c1094 September 11, 2013