a "japan flag" is the stain created on white or light coloured fabric, often on bed-sheets or underwear, when a total bottom has been railed bareback up the ass by a footlong and bleeds from their butt profusely
"That dude fucked me so hard last night that I woke up and my bed looked like a Japan Flag!"
"I had cheeky bum sex in the janitor's closet with the Quarterback, and he want in raw and rough, so now my ass is bleeding and my underwear have a total Japan Flag situation going on"
"I had cheeky bum sex in the janitor's closet with the Quarterback, and he want in raw and rough, so now my ass is bleeding and my underwear have a total Japan Flag situation going on"
by n1ck_sP3ncerr July 13, 2016

by katty18 June 7, 2014

by uboy84 April 28, 2011

Making out in your moms Odyssey with a chick who says she's down but is not actually so you try and get denied.
by Sergizzle Koala Ryan Explains Containment Gina June 11, 2006

1980's Glam rock/Hair metal from Japan.
Not quite new or revolutionary, just a hair metal band that formed after the whole hair metal era.
Not quite new or revolutionary, just a hair metal band that formed after the whole hair metal era.
by Big Bob December 29, 2004

This name is prevailing name all around
the world. The origin of this name came from endevors of Europe in 16 century.
the world. The origin of this name came from endevors of Europe in 16 century.
by Nobuki Honda September 6, 2003

by miamac April 11, 2011
