The ultimate trump on the Interwebz. Ends all arguments and debates.

Similar to the religious argument, "you have no faith."
Person 1: ...and that's why you suck.

Person 2: NO U.

Person 1: *Head explodes*
by wexer9 September 27, 2008
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Perfect Comeback to any insult. Or even sometimes, a conversation ender.
Jaimie: Your Fat
Brian: no u
Jaimie: *Freaking Dies*
by Zxturn February 26, 2020
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The only two words that are capable of ending an argument, a life or even a world war. These here words will instantly obliterate any opponent who dares to cross your mighty power. It has magical powers beyond our comprehension and it’s is believed that no u wiped out the dinosaurs. You must be careful with these words as with great power comes great responsibility.
Chad - “Bryce your grandmas dead”
Bryce - “no u”
Chads grandma:
by Master Tickles August 8, 2019
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The absolute BEST fucking comeback to the any insult in the world, including "ur mom gay". The possible end to ANY conversation in the world, even if it's NOT something you can say it to. Currently, the only possible way to defeat "no u" is YFM's "UNO Reverse" song, which doesn't work if the opponent doesn't know the song; so don't take it as a complete win. Here are some possible examples:
Example 1

Bob: Hey wanna watch gay porn?
John: Bruh what? I'm not gay!
Bob: Oh sorry, forgot that ur mom's the gay one.
John: What's that even mean?
Bob: So ur mom gay.
John: no u
Bob: *fucking dies*

Example 2

Phred: Hey Phil?
Phil: Yes?
Phred: ur mom gay
Phil: no u
Phred: BAM! UNO REVERSE CARD!
Phil: Dude, I already said "no u"
Phred: Wait, you don't know the "UNO Reverse" song?
Phil: Uhh... No?
Phred: Fuck. *dies*
Phil: wtf just hap-

Example 3

Bill: Hey pal what's u-
name: lets just get it over with
Bill: Wha-
name: ur mom gay
Bill: Dude... What are you talking ab-
name: JUST SAY "NO U" YOU IDIOT
Bill: WHAT'S WRONG WITH YOU BRO?
Jack: Hey guys, ur mom gay!
name: oh i think i read the script wrong
Bill: What?
name: no u
Jack: BAM! UNO REVERSE CARD!
name: FINALLY *fucking dies*
*silence*
Bill: WHAT THE FUCK JUST HAP-
by Alloy Dreemurr November 2, 2022
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Me : ur mom gay
Bolbi B Johnson : no u
Me: me yes ?
Bolbi B Johnson : yes u
Me: no u first.
by Xiceska March 2, 2018
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The one and only continuous never ending debate with a single argument, being the counter argument itself. Several persons may join the debate at any time, not causing any interruption or disruption.
(... Hours later)

-no u
-No you.
-No u.
-Hi there...
-no you.
-NO YOU
-no u
-NO U
-Later..
-No you
-no uu
-NO you
-NOu YoU
-no uou
-no you
-no u

(...)
by #Hole January 17, 2010
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to deflect any insult attack. more effective than a Yu-Gi-Oh trap card.
<jimmy> lol bob ur dad lesbian
<bob> no u
<jimmy> fucking dies
by a_bunch_of_zeroes May 29, 2018
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