unbff 

1.) a best friend forever that is no longer your best friend

MichelleA: "Michelle B was my best friend, but now she is my unbff."

MichelleB: *gasp*

unbff by MichelleB June 25, 2009

unbaffleable 

the ability to not be baffled

Shane: We're unbaffleable!
Ryan: That's not a word

unbaffleable by Yeet my kids January 21, 2020

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

UMBFF 

ULTRA. MEGA. BEST. FRIEND. FOREVER.

is leuheya your umbff? duhh she’s the best.

UMBFF by umbffben April 28, 2019

uneffingbelievable 

A cleaned-up way of saying unfuckingbelievable.

Well my little sweetheart, your drawing is nothing less than uneffingbelievable!

uneffingbelievable by Dr Bunnygirl July 18, 2020

Unofficial 

Short for Unofficial St. Patrick's Day, this is an event held each March at the University of Illinois at Urbana-Champaign. This is the largest local drinking holiday in the United States. It was created due to St. Patrick's Day being held over U of I's spring break. Students from across the country visit Champaign-Urbana to take part in this, as their schools do not consume as much in an entire decade as U of I does on Unofficial.

"Dude, don't you love going to IU?" - Indiana Student 1

"No, I am going to U of I this weekend to celebrate Unofficial. I wish I had gotten good enough grades to get in there." - Indiana Student 2

"Yeah, you're right. They are better at academics, athletics, AND they have way more fun." - Indiana Student 1

Unofficial by Subway142 February 9, 2013

Unofficial Relationship 

When you do what people in a relationship would do but, You aren't dating yet.

Person 1- Are you two dating?

Person 2- It's kind of a Unofficial Relationship type deal..

Unofficial Relationship by PattyB. January 23, 2016