Japanes Flag 

When you bang a girl in a hotel room when she is on her period and leave a huge red spot that looks like a japanes flag on the sheets.

Oh man the people in room 212 just left me a huge japanese flag.

So did you make a japanes flag last night??

Japanes Flag by blue duck flys at midnight November 21, 2011

Japanese Flag 

When a woman experiences her period in the middle of the night while sleeping on white sheets, leaving a giant red dot.

I gotta get new bed sheets, i woke up on the japanese flag this morning.

Japanese Flag by TheOrcaWhale July 17, 2011

arse like the japanese flag

a burning and / or stinging sensation in the anus, cause by irritable bowel syndrome, oft the result of eating very spicy food. Also refered to as ringsting, ring of fire, fire-ring.

Bleedin' 'eck! that ruby murry gave us an arse like the japanese flag!

arse like the japanese flag by red wine bitch January 3, 2003

Japanese Flag Syndrome 

The sickness where you spend most of your time sitting on the toilet, usually the day after eating spicy fast foods.

Joe called in sick to work, said he had an extra spicy indian last night and his ass now looks like the Japanese flag.

Ah the old Japanese Flag Syndrome then? Rough day ahead for Joe!

Japanese Flag Syndrome by defunkt October 1, 2011

Japanese Flag 

The remnant white sheets left over after sex with a girl on her period. Leaving a round red spot on the sheets. Then being able to use them as curtains.

Yup John Doe had Japanese Flag curtains. Jane must have been o.t.r..

Japanese Flag by Par64Tat August 29, 2014

making a Japanese flag 

A much classier way of saying "on the rag", making a Japanese flag is the process of taking a white sanitary napkin and putting a big red blot in the middle of it.

Jacob: Dude, what crawled up Linda's ass today?

Robert: She's making a Japanese flag.

Jacob: Ohhhhhhhhhhh....

making a Japanese flag by tunnelr@ September 28, 2009

Japanese Flag 

Describes the effect of eating too much hot food, on the anus. White with a glowing red spot in the middle

Man that Vindaloo just reached the other end, burned so much I was jumping round the toilet rim, now I got an arse like a Japanese Flag

Japanese Flag by Jules W December 17, 2008