Maruta 

1) Maruta translates into the Japanese word for wood or logs.

2) The name of a Hentai comic

3) (commonly) Mad Scientist slang for one or more non volunteer human subjects.

Due to the mad scientists at Unit 731 and their use of the word as a secret synonym for "non volunteer human subjects"

the word will usually refer to "human subject", rather than actual "wood" when it is spoken in an non Japanese non wood related context.
Especially after the film "Men Behind the Sun" in which there is a scene explaining the meaning of "maruta" to a group of young cadets who have not done their homework.

The secret synonym of "logs" was chosen due to the fact that Unit 731 and its operations at a point was disguised as a lumber-mill, plus that most of the experiments would involve cutting up the logs and that these would be put in the stove and burned at the end to dispose of the evidence.

So if a mad scientists conducting some unofficial research asks you to bring maruta, he/she will usually be disappointed if you show up with firewood.

In popular culture:

As with many other Unit 731 related words it is also the name of a band and several songs in the heavy metal, thrash metal and Grindcore genre

4) It can be a Proper noun

"pick up that hitchhiker we are running low on maruta down at the labs"

Maruta by Danmark November 11, 2012

Shiga Maruta 

The controversy that happened back in 2020 which surrounded around My Hero Academia and its author Kohei Horikoshi. It showed allegories with Unit 731 and resulted to international fans, especially Chinese and Koreans unstanning it and sent his franchise to the Khia Asylum.

"Ok I noticed that mha isn't relevant anymore than before"
"It's because of the shiga maruta controversy bestie, because of that it flopped harder than Katy's 143 album IJBOL"

Shiga Maruta by Saitama123 August 31, 2025

maruša 

A wonderful pretty girl, that deserves the best boyfriend on this planet.
She might be quiet at first, but when you get to know her better and she'll get comfy with you, you'll find out that she's actually the craziest and best girl ever.

Girl 1: Wow, Maruša is amazing.
Girl 2: Yeah, she is.
Girl 1: I want to be like her.
Girl 2: Yeah, me too.

maruša by nani69 April 14, 2013

Martafact

A random, unsubstantiated and often untrue yet entertaining "fact" or tidbit about nothing important which can only be revealed by Marty.

Human hair, if condensed into a liquid form, contains 40 grams of protein per serving.....thats a Martafact!!

Martafact by DaveLegz January 14, 2009

Marukaite Chikyuu 

The ending song for the first season of Hetalia: Axis Powers. It's basically a happy-go-lucky song about loving pasta and world peace.

Marukaite Chikyuu, Marukaite Chikyuu, Marukaite Chikyuu, boku Hetalia! Marukaite Chikyuu Jitto Mite Chikyuu, Hyotto shite chikyuu Boku Hetalia! Aa hitofude de Mieru Subarashii Sekai Nagagutsu de kanpai da Hetalia!

Marukaite Chikyuu by thatawesomenorwegian March 28, 2013

Martaine

Martaine is a beautiful, tall women, with a good heart.

A Martaine is kind, compassionate, and is the epitome of the perfect woman and mother. Other women dont compair to her, she's on another level of beauty. She cant see it though, but when she realizes it, she's the kind if person to continue being kind and loving to all.

Friends will call a Martaine, taine. Its quicker.

People use taine to say beauty or being loving.

Beautiful Kind Loving Understanding Gorgeous Wonderful Perfect Martaine Taine

Martaine by MoyoAndUpendo December 26, 2013

MarStarBro 

An asshole who harasses EXE fans. He also uses his age and "mental health" as an excuse when he would rush his mod, like how Milk was so mid cuz he rushed it.

MarStarBro doesn't deserve oxygen

MarStarBro by MarStarBro October 25, 2023