The most stupid response ever, almost all normies use it. Its because they don't have the mental capacity for coming up with a great comeback. It is a stupid response, though some memers, and few dank memers use it, but only when dealing with normies.
Mike: Ur mum gae.
Bill: No u.
Liam: Guys! The normies are fighting!
Mike: Yeah, and ur mum gae Liam!
Liam: Fuck off Mike, I don't deal with normies, I'm a memer.
Bill: No u.
Liam: Guys! The normies are fighting!
Mike: Yeah, and ur mum gae Liam!
Liam: Fuck off Mike, I don't deal with normies, I'm a memer.
by TheStrangerWhoKnows November 19, 2018
Get the No Umug. 
An offensive teem deflecting any previous remarks made about you some may consider this the most offensive slur.
by Butt sexyz January 30, 2018
Get the No umug. The ultimate comeback to any negatory statement made towards someone on the iNtErWeBs. Basically a trump card comment. Spelled with only the 14th, 15th, and 21st letters of the alphabet, this revolutionary phrase originating from the internet of ‘memers’ is a phrase that can be used in all situations. Whether it be a racist joke, a classic your mom joke, incest joke, or something personal directed towards you- ‘No u’ works in every situation.
Shaheer: you’re gay
Me: NO U
Shaheer: o shit nigga where’s yo dick I needa succy wuccy 5 buccy
Me: I only have $2.50 tho 👀
Me: NO U
Shaheer: o shit nigga where’s yo dick I needa succy wuccy 5 buccy
Me: I only have $2.50 tho 👀
by xxthatoneweirdgirlxx May 9, 2018
Get the No umug. The ultimate end to any argument, reverses any insult directed at the user of the Magic No U Arts. The recipient immediately explodes once the reversal is said.
Thanos: In time, you will know what it's like to lose
Me: No U
Thanos explodes into 537 quintillion pieces
Me: No U
Thanos explodes into 537 quintillion pieces
by T-Man 1302 June 7, 2018
Get the No Umug. 
by Mamzmzmskksskzp August 22, 2020
Get the No umug.