It's when a kid (9 to 14 years old) gets mad, they will use it as a last resort.
You can say no u as a comeback or you can say ur dad lesbian.
You can say no u as a comeback or you can say ur dad lesbian.
by UrbanKiwi May 16, 2018

you don't know how to comback with a sick roast? use this career destroying saying, it is also the worst thing you could say at a funeral or a family dinner.
person 1: my mom just died, i'm so sad!
person 2: ur mom gay
"person one dies"
sister: can you pass me the ketchup?
me: no
sister: fuck you
me: your mom gay
person 2: ur mom gay
"person one dies"
sister: can you pass me the ketchup?
me: no
sister: fuck you
me: your mom gay
by ur parents gay November 10, 2021

by mmmm yes April 21, 2018

Sarcastic statement made by high school kids. Mixture of "your mom" "you're gay". Very rarely used seriously
by YaBoiJayCutlet January 7, 2016

It is the most powerful and devastating roast. By saying this, the person being roasted will cry and get crippling depression.
by The Real NerdMysteria May 19, 2018

an insult to say to someone. another way of saying this is,"your mom BIG gay"
if someone says ur mom gay to you say, "no u"
if someone says ur mom gay to you say, "no u"
by thedictionarian101 May 11, 2018

The realization that “no u” is literally “uno” with the letters rearranged. Uno as in uno reverse card. This also makes the uno reverse song comeback useless.
Example 1: I just realized that “no u” is the letters of “uno”, Like as in uno reverse card, rearranged. Yup. That’s Uno mom gay for ya.
Example 2: Ur mom gay lol. no u. BAM! UNO REVERSE CARD! Yes that is what I did. What? “no u” is just “uno” with rearranged letters. Whaaaaa? So it makes the whole ‘uno reverse card’ thing useless. Huh...? When you realize it, the realization’s called “Uno Mom Gay”.
Example 2: Ur mom gay lol. no u. BAM! UNO REVERSE CARD! Yes that is what I did. What? “no u” is just “uno” with rearranged letters. Whaaaaa? So it makes the whole ‘uno reverse card’ thing useless. Huh...? When you realize it, the realization’s called “Uno Mom Gay”.
by Forgive Marcel February 26, 2023
