A test used in 19th middle and upper class Black communities to decide of a black American was sufficiently white enough to warrant inclusion. The idea is that your hair should be as straight as a ruler. Today the practice is not rightly condemned as "colorism" but is not altogether abandoned. See also brown paper bag test
"Don't go swimming or you won't be able to pass the ruler test when you meet your date's parent's tonight."
by Bill Peters August 20, 2006
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A legendary device, said to only be wielded by those exhibiting extreme intellect and skill. Some believe that it is more suited for artistic purposes than arithmetic. Others believe it is a panacea for any problem.
Sir Rodger cursed himself for not remembering his curved ruler when he attempted to craft a silly sketch.

Clint used a curved ruler to finally understand women.

Lee had no idea why he existed, but with the curved ruler, he had purpose.
by Ânonymous March 11, 2015
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"man that beta-ruler, best stay away from MY girlfriend"
by derrrrrrrrr September 8, 2008
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video made of pictures, playing to the music "Tally Hall - Ruler of Everything"
guy 1: minecraft is ruler of everything!
guy 2: nah, minecraft is ruler of everything.
guy 1: *mad*
by kinda sus ngl March 10, 2021
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Watch out, he's always behind you. He's everywhere and nowhere at the same time. He'll teleport away before you even know he was there, so don't even try to catch him. If you dare backsass him, he'll banhammer you so hard you won't even know what hit you. So watch out, or you'll get a taste of the holy hand grenade of antioch.
guy: hahaha! you're a poopie!

Guy2: woah! watch out man, that's the supreme ruler you're talking to there!

Supreme Ruler: Banhammer.

guy: what happened?
by Bayardo-yo-momma-stiener September 30, 2011
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When you use your body to measure something,be it your entire body or just parts of it.
Men tend to use their penises as human rulers.

Chris knew each of his feet was exactly twelve inches,so instead of using a tape-measure to measure the wall,he walked next to the wall putting one foot next to the other.

Jack used his 12-incher to measure the ruler and make sure it was exactly 12 inches.

Arwin knew most markers are 6 inches because the were the same size as his dick.

I had trouble writing examples for this definition,so I used my three-inch long middle fingers and found out the average business card is about 3.25 by 2 inches.
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A method used to measure a person's penis size. It is measured by where the skitmark is left on the toilet bowl.
In the front indicates a small penis size, in the middle indicates a medium penis size or good sanitation after using the toilet, and on the back indicates a big penis size.

This method works for mosts toilets, and is considered solid proof.
Jon: "Hey! Bob just got finished taking a shit! He always brags about his big cock, let's check it out once and for all by using the toilet ruler"

Kyle: "MAN! Bob really does have a huge dick! The skitmark is at the very back of the toilet bowl!"
by chillsaster November 15, 2010
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