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Abbreviation of the phrase “You don’t know what you don’t know”. Phrase coined by Martiros Aghajanyan quickly became popular due to his distinctive tempered pronunciation of it. Quickly gaining popularity in Los Angeles area it is often used to refer to that of what we are unaware or uncertain of. The phrase is similar to Donald Rumsfeld’s quote in it’s literal form “We don’t know, what we don’t know”, but is more synonymous to Charles Dickens's “Never say never”. It is often accompanied with a slightly wiggly upwards movement of the index finger and is predominantly used in a sarcastic context.

Synonyms: You never know, Uncertainly, Never say never, Don’t say “HOP” before you jump (Slovak proverb)

Official homepage of YDKWYDK organization is ydkwydk.org
Narek: Trump will never become the President of US.

Martiros: YDKWYDK! You don’t know what you don’t know! ☝🏻
YDKWYDK by ArmiusXelokius May 29, 2018
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Stealthie 

when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.

This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"

FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"
Stealthie by gwenhyfar October 2, 2016
Word of the Day on May 25, 2026
Related Words

Summer Teeth 

When someone has a lot of missing teeth.
Mannn, that dude has summer teeth!
What do you mean?
Summer here, summer there...
Summer Teeth by BeckPot August 2, 2012
Word of the Day on May 24, 2026
The grindset is a contemporary ideology of self-exploitation disguised as strength, deeply tied to the aesthetics of the “sigma male” and to new digital forms of patriarchy. It promotes the idea that human worth depends on productivity, economic success, absolute emotional control, and the ability to work endlessly, turning vulnerability, rest, community, and tenderness into signs of weakness. Beneath its rhetoric of discipline and power often lies a profound inability to relate healthily to pain, fragility, and human interdependence.
“That’s the grindset, brother. While weak men sleep and complain, sigma males stay disciplined, work in silence, suppress emotions, and build power while everyone else wastes time chasing comfort.”
Grindset by Omega-Male May 22, 2026
Word of the Day on May 23, 2026
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
An Irish phrase meaning shit, derived from ass
(Not to be confused with the literal description of one's buttocks)
"Did you hear the song Aylek$ dropped?"
"Hardly. Her music is absolute cheeks."

"My boyfriend say LaFlame is cheeks."
"Tell your boyfriend I said it's his mixtape that's cheeks."
Cheeks by thecartisan April 26, 2020
Word of the Day on May 21, 2026

sans sheriff 

Lawless use of fonts or typography, with no regard to aesthetics or legibility
I'm putting this CV straight in the bin. Written totally sans sheriff.
sans sheriff by Jamarley July 3, 2019
Word of the Day on May 20, 2026