An as of yet untested sex act in which the perpetrator, whilst being fellated by the victim, screams "BANZAI!!!!!" and rips a deafening (preferably wet) fart directly in the face of said victim. Extra points are awarded if victim is either drunk from excessive saki or is somehow dressed as a geisha.
"I no longer have a girlfriend after our night in Tokyo ended with a Japanese War Tuba at the hotel."
by Gjers July 10, 2006

When you're having sex with a girl in reverse cow girl position and then she gets up and shits on your dick. Then you cum on your own dick and she sucks it all off.
by Mike Cannon May 22, 2004

Close to the Japanese Rain Goggles but your man only has one nut sack that drops. Picture the Monopoly guy or Mr. Peanut.
I was trying to give my girl the Japanese Rain Goggle but it was cold and only was able to give her a Japanese Rain Monocle instead.
by Mr.Ballsack August 30, 2013

When you piss on someones face, getting it all through an onion ring, then shitting all over their face.
by AlimonyBob October 14, 2011

When a man has an extremely large boner and the female/male (depending on preferences) grabs the large boner and bends in a very obstructive fashion, which may lead to a crack in the pelvic area.
I was at my friends and he was having a very pleasurable dream and so i decided to give him the japanese whammy bar.
by 69 Baby Jesus 69 July 1, 2009

by Shadow anus November 16, 2017

A Japanese car produced/made 1999 or prior, the car generally resembles the great Yamato Battleship in its presence on the road, This is due to a number of things such as size, aggressive appearance or beefy appearance, history or even mystery. The car is usually unnecessarily long and wide, it could also be described as a presidential / imperialistic limo who's presence on the road could also make you feel uncomfortable. Don't be fooled though these weapons of mass destruction usually have the finest engines to be produced out of Japan and will eat your euro piece of shit for breakfast lunch and dinner.
Guy 1: "Woah! did you see that 1998 Toyota Crown drive past"
Guy 2: "Yeah I did, It's a bit of a Japanese War Chariot"
Guy 2: "Yeah I did, It's a bit of a Japanese War Chariot"
by H4RSH October 16, 2021
