Yukkui 

the sexiest and hottest person ever?? ily yukkui!!

Man Yukkui? They're so hot and cool.

Yukkui by yukkuilvrr February 24, 2023

Yukki Effect 

When yukki is in charge of a group and it doesn't launch for several years and then moves on to a different group and repeats the cycle.

"yo I just recruited yukki to help lead my new group"
"dude... big mistake.. the yukki effect will take place if you don't fire him"

"yes I finally became hc in one of yukkis groups I can't wait for it to launch."
"lol it won't"
"why?"
"the yukki effect"

Yukki Effect by Decrupt June 25, 2020

Yukkuri shiteitte ne 

A meme involving giant, disfigured heads resembling those of Touhou characters. It originated on 2ch in early 2008 when an Anon tried to make a Shift_JIS portrait of Reimu and Marisa and failed horribly. Another Anon thought the failed attempt was humorous and drew the infamous original picture (shown below right). Ever since that fateful day, yukkuri heads have dominated parts of NicoNico and made cameos in numerous other pieces of Touhou fanart. Their catchphrase "Yukkuri shiteitte ne!" literally means "Do it slowly!", but has been more loosely translated as "Take it easy!" by the English-speaking Touhou community. This remains the basis for many of the jokes centered on yukkuris.

Reimu: This stalking deformed head of me is quite annoying.
Yukkuri Reimu: Yukkuri shiteitte ne!

Yukkuri shiteitte ne by That one guy over there in the August 17, 2009

Yukki 

Yukki is a really smart girl. She is amazing at the arts and everyone loves her. She is an amazing friend who is always excited to see you and will always stand by you. Little do you know you probably have a lot in common with her.

Wow that girl is such a Yukki!

I know, and she can really draw!

Yukki by KKKitty August 29, 2014

yukkious 

An adjective meaning 'sickeningly revolting'.

Fiona thought men who dribbled were yukkious.

yukkious by Lucretia March 1, 2005

yukkio 

emo asf
i came out of his balls

yukkio: ur mom
me: what about my mom
yukkio: i did your mom
me: yeah i know that's why im here

yukkio by ew.fumi December 5, 2021

Yukkio 

They prettiest boy I have ever seen. He has an amazing personality and gets along with people easily. He is very smart, though he’s a sissy little baka at times (I’m sorry). He likes watching the anime aot and his favorite color is blue. He’s a bit of a dummy, but I adore him

Breh Yukkio is a GOAT

Yukkio by Jksleftbigtoe May 16, 2022