The act of staying indoors and never leaving your house, especially to play video games all day. Usually describes the condition of gamers or those who follow the hikikomori lifestyle outside of Japan

Yo why does Joe never go out? He’s always at home playing GTA
Idk man he’s under Japanese house arrest

He needs to touch grass

japanese house arrest by papaoddysefs April 10, 2022

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japanese lunch time rush

The most famous line of the character from Kuroko's Basketball, Kagami Taiga. It's when people in japan tend to all rush and flock in a food establishment (in the anime's case, the school cafeteria) because the japanese only have a 30 minute lunch break. That sucks.

"Woah! Look at all those Japanese people going crazy for that special sandwich. THIS IS JAPANESE LUNCH TIME RUSH!"

japanese lunch time rush by Ninjin Tensei April 10, 2015

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Japanese Dog

Noun. To yank someone's collar or, preferably tie, violently back and forth while yelling "are you a Japanese dog?". This will no doubt cause them to snarl angrily, much like a Japanese dog would if you jerked their collar back and forth. Giving someone a Japanese dog is frequently considered a merse.

Marshall totally gave Christian a Japanese dog before his Spanish presentation. Christian had to stand in front of the whole class with his tie fucked up!

Japanese Dog by ehuzzie October 25, 2018

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japanese creampie

When you're watching a japanese porno and the guy finishes inside her pussy. Usually the guy inserts his grubby fingers into her pussy and tries to scoop out the non-existing cum

Mike: what's your favorite fetish?
John: I love japanese creampies
Mike: dude, that's nasty

japanese creampie by Nerdy Ned October 10, 2016

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Japanese Gnar

When something (most often Japanese Media) is so messed up and/or disturbing that you can say with confidence that "only a Japanese person could think of something that gnarly"

The Anime, School Days, (and especially its ending) is the epitome of Japanese Gnar.

Otaku 1: This anime is crazy! This chick had a miscarriage and went insane! She ate the dead fetus and merges conciousnesses with it and then she starts murdering a class full of elementary school students because she is jealous that other parents children actually survived! It's great! In the end an 8 year old kid cut open her stomach and removed the fetus, which then became a massive blob of evil that devoured the mother, and then corrupts the 8 year old kid, driving them insane.
Otaku 2: dude... that is some next level Japanese Gnar shit. You're making it sound like a masterpiece, it's just a bunch of sick perverted trash.

Japanese Gnar by Ravenous Rena November 19, 2017