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A rabbit/chipmunk (whichever you prefer) looking, alienic mutant form of creature which exists deep in the sewers.
This particular gremlin has only been speculated to exist as few records or eyewitnesses are readily available to confirm this ancient myth.
Most eyewitnesses do not live to tell the tale after meeting this particularly horrendous monster.
The majority of the unfortunates who encounter a Yeyeng do not live to tell the tale. It is believed that the Yeyeng consumes its victims by eating them inside out.
The remaining survivors are better off dead, having suffered a tremendous trauma. They are regarded as the mentally retarded people among our society and now reside in various mental institutes.
Omg you totally look like a Yeyeng!

Tom : What're you wearing for Halloween?
Jerry : A Yeyeng mask.

Jack : Why is mommy in hospital?
Jill : She saw a Yeyeng.
Yeyeng by JashinKid April 26, 2009
Related Words
n-
1. Any organism lacking cognitive ability who can do the complicated (without understanding it) but entirely misses the obvious
2. A klutz

v-
1. To flatten the forehead, usually with a large blunt object

adj-
1. Of or pertaining to Yupeng
2. Stupefyingly idiotic

Related Words: Yupenguin, Yupium, Yupain
Related Forms (unused, see forms of Yupenguin): Yupenate, Yupenize, Yupengly
n-
Alex: "Haha, look over there; it's a yupeng."
Steven: "What the hell are you talking about?"
Alex: "That guy, right over there!" *points to open area with a few people scattered around*
Steven: *squints round eyes to form chinky eyes* "I don't see anything..."
Alex: "You know, the thing that spreads a stupifying drug when it's around you..."
Steven: *takes a second to realize that a yupeng is being referred to and suddenly sees it among the crowd* "OH WHOA! Holy shit, I couldn't see him because he was sideways!"

v-
"Ow, that door just yupenged me! Why didn't you tell me it was closing?"

adj-
"Whoa, its a Yupeng sticker."
"Whoa, I just had a yupeng moment!"
Yupeng by SITeorist October 12, 2006

Yevengado 

To be stupid in every aspect and unaware of the obvious
Alex: “That’s why your shoes are raggedy
Manuel: “I’ve been wearing Flipflops all day. You’re a Yevengado”
Yevengado by Jobn126 July 8, 2020
Yeseng means first lady, someone named yeseng would be very confident and independent but insecured at the same time, she can also slap you if you mess with her friends

Yeseng was also the name of the tai ahom king's first daughter
That's yeseng, you better not mess with her
Yeseng by Yeseng~ November 26, 2021

yeengotta 

You do not even have to anymore, forget about it, or to no worry about it anymore.
For example: Don't Tell 'Em by Jeremih/YG? "Yeengotta tell 'em, don't tell 'em..'"
yeengotta by Je Riley March 24, 2019
well known from south park
rednecks get angrry that future folk took there jobs so they yell
They took ouare jerbs!
Them future folk took ouare jerbs!
jerb by Jimberley Kim April 7, 2005
Word of the Day on May 22, 2026