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.
by UrbanKiwi March 26, 2018
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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
by ur parents gay November 10, 2021
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hah what did you say to me?! UR MOM GAY!!!!!!
by mmmm yes December 20, 2017
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Sarcastic statement made by high school kids. Mixture of "your mom" "you're gay". Very rarely used seriously
Tim: Can I borrow a pencil
Joe: no, your moms gay
Joe: *gives Tim a pencil*
by YaBoiJayCutlet November 5, 2015
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It is the most powerful and devastating roast. By saying this, the person being roasted will cry and get crippling depression.
“Hey Lukas! Eat a dick!”
Jim, ur mom gay”
by The Real NerdMysteria April 1, 2018
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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"
"oh by the way, ur mom gay"
by thedictionarian101 March 14, 2018
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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”.
by Forgive Marcel February 26, 2023
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