YBAST 

An acronym meaning "Your brothers are sleeping together." Originally developed as a temporary replacement, in the Anime-Heaven script of the Naruto 95-96 Special, for a line that no translation had been made of yet.

YBAST was then made into the name of the editing group who worked for Anime Heaven at the time and later composed the majority of the Dattebayo Fan subbing group staff. YBAST is a 5 member (each assigned a letter) fan sub editing team.

There is something I must tell you... your brothers are sleeping together.
-or-
There is something I must tell you...
YHBT

Additional use as a group name:
I saw that YBAST just did another quality Naruto release.
-or-
OMGWTF!NARUTO233 WHY ISNT IT RELEASED YET? MUST BE YBAST'S FAULT!

YBAST by Fate March 6, 2005

Yeast yeti 

Yeast yeti is what you call annoying or racist white people

Shut the fuck up you dirty yeast yeti

Yeast yeti by Mi’Annatheniggarat December 30, 2020

Yasta 

An Arabic slang word describing a cool young Egyptian man. This word is commonly used in UWaterloo UAE.

Those three Yasta's are looking very fresh.

Hey Yasta, did you do the calculus assignment?

Yasta, 3ayez shay karak?

Yasta by qalwa12 January 26, 2013

A little yeasty on the peckeroo 

A yeast infection on your penis. A term coined by Adam Carolla on the Loveline radio show.

Brian: Oh man, I got a yeast infection from some cunt.
Steve: Got a little yeasty on the peckeroo, bro?

A little yeasty on the peckeroo by Vodka23 October 16, 2008

Yeasting 

When shit starts expanding in your intestines before it is ready to come out. The step right before prairie-dogging and two steps before the loaf is ready to be taken out of the oven.

Oh shit I'm yeasting! I need to find a bathroom pretty soon.

Yeasting by Soonerspic October 15, 2008

yeastopotamus

A very fat girl with a yeast infection.

Ted: Check out that girl over there...She's smiling at you. You should go talk to her.
Bill: No way! She looks like a yeastopotamus.

David Attenborough- famous Nat. Geo. narrator: "In the wilds of Africa, the only creature that scares the mighty cockodile is the equally large and ferocious yeastopotamus.

yeastopotamus by Two in the Stink November 11, 2017

yeastiality 

a fetish which involves having sex with any form of baked goods or pastry

She's really into yeastiality.

yeastiality by Tassadar547 September 26, 2005