X=9 (X equals 9) is a glitch associated with Super Mario Maker and Super Mario Maker 2 where assets placed in the 9th horizontal tile from the left behave differently than in other tiles in the grid. The grid tends to recur in multiples of nine in the grid, such as in the 129th horizontal tile, which exhibits similar properties.

The most common glitch is clipping through solid assets (like question blocks or walls) when bumped from underneath.
Ok, let's see what's in this question block, maybe it's a mushr... What the hell just happened? Did I just clip through the wall? Is this X=9?
by Abarbarea July 5, 2019
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It's what you have when you flip out.
My wife found out that I was drinking all night and she about had a fucking 9 x 9.
by Tomsterama March 4, 2008
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is mathematical expression/equation sex that means two

general mathematical symbols or expressions, numbers, etc
√99: What (so)up guys, I was (6 x 9)+(6+9) = 69 with (34,5 x 4)
Plus Symbol (+):What is that??
3:Go to urban dicionary to see lol
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x = 3y-27
Omg he is so clever he figured out Y = x/3 + 9
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When a morbidly obese woman with thighs covered in cellulite uses an extra small tampon and it slides out and ramps off the cellulite into a guys eye, which in turn causes him to vomit on her pubic area, and after the tampon a deoderant stick flies out covered in crabs and his the guy in the balls, giving him crabs that bite him then inturn he jumps and steps on the womans massive single boob which explodes abcess puss all over the world, which drowns and Al Gore makes a documentary of it including the 2girls1cup video to explain everything from your baby's daddy to juniors syphallis.
by Biccc April 21, 2008
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Don't try to solve it, LOL .
Paste it on Google and a Heart symbol will appear <3
It's a graph drawing from that expression .
Hey babe. (sqrt(cos(x))*cos(200 x)+sqrt(abs(x))-0.7)*(4-x*x)^0.01, sqrt(9-x^2), -sqrt(9-x^2) from -4.5 to 4.5 !!!
by Nguyen Vu Long December 6, 2011
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