It's meaning is to "decimal." To "decimal" is to use decibals in anything, math related or other. If someone goes to you and asks what you are doing while you're doing a math test, tell that you are "decimaling."
"Hey, Jim, what are you doing in your math test?" "I'm just decimaling."
by GrammarNerd50899 May 29, 2022
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Used in a minority of countries to pretend the presence of a metric system, when in fact a non-metric system is used. Instead of using a designated smaller unit or real fraction, the bigger unit is used with a decimal point.

More often used in combination with the decimal system to describe numbers that are not even.
Geoff: “It’m 6 feet and 5 inches tall.”

Heidi: “uh… I only know the metric system.”

Geoff: “Oh, sorry. That’s 6 5/12 feet.”

Heidi: “That’s a real fraction, not metric, though.”

Geoff: “Oh right. I mean 6.42 feet.”

Heidi: “OK, that’s a decimal fraction alright, but still not metric 🤣”
Geoff: “Hey Siri, what’s 6 feet and 5 inches in metric?”
Siri: “6 feet, 5 inches is equivalent to about 1.96 meters.”
by Phrackle April 11, 2021
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When your family has an even number of children and there is not an exact middle child, the “middle children” are called decimal children. This is because there is no even number with a whole number as the exact middle. The middle of 4 is 2.5.
That family with 4 children has 2 decimal children. The “middle children”.
by Smollysmurph._. May 2, 2020
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To be having fun on ecstasy and sitting in a chair jiving to the grooves closing you eyes for a second and you suddenly lose consciousness and drift out.. (Death)
He was jiving and having a good time to the tunes and sat down in the chair where he closed his eyes for what was supposed to be a second and he decimal'd out... It's tragic... a bad decimal-out it was
by Confuction August 12, 2021
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Definitely a real thing you can buy in Jars.
Hey Joe, I've got your Decimated Coconut right here. Get it into you.
by Barney_el_cid December 8, 2020
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1: A mythical figure whom possesses math skills of a much higher level than that of an average mortal man. (Believed by some to have the ability to solve complex quadratic equations with minimal expenditure of time and/or physical exertion.)

2: One whom has the ability to go medieval on that seemingly unsolvable and obscure "The train left the station" problem's ass.
"Im no denominator decimator, but 31 divided by 2 doesn't exactly perplex me."
by The Math Merlin December 29, 2007
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