A made-up term used by Charlie Sheen in the Two and a Half Men episode entitled "Ow, Ow, Don't Stop" aired on 11/22/2010. There is much speculation that it might be a crude sexual term like many of the invented sex acts seen here on Urban Dictionary. Many fans have created their own obscene definitions on sites such as Yahoo Answers.

Some have theorized that Japanese Rain Goggles may be in reference to Mejikara anti-wrinkle goggles, which are made of silicone rubber. Charlie may have meant Courtney's fake boobs, also made of silicone, were in his eyes.
Charlie: "Have you ever had a woman give you Japanese Rain Goggles?"
Allan: "I've never even heard of that."
Charlie: "Neither had I until last night and now I don't know how I ever lived without 'em!"

Girl: "What are Japanese Rain Goggles?"
Boy: "I'll show you later baby."
by alittleobsessive November 23, 2010
A phrase that means absolutely nothing but was designed to cause hype on the internet.
Charlie Sheen said Courtney gave him "japanese rain goggles" last night...
by Caaaxy! November 24, 2010
Japanese Rain Goggles is when a man gets a oral sex from a woman while his testicles are on her eyes. Once he's about to reach an orgasm she blinks quickly giving him a slight tingle sensation to his testicles and increasing the pleasure.
Damn, i hooked up with this chick last night and she did the Japanese Rain Goggles, best head ever.
by dieselboy_tm November 24, 2010
n. When a man covers a woman's eyes with his balls while she gives him felatio.
Bitch get in here and I'll give you Japanese Rain Goggles.
by texasredeyechicka November 23, 2010
Fictitious sexual act performed on the TV show Two and A Half Men. In the episode, Charlie Sheen's character refers to his new girlfriend, Jenny McCarthy, giving him Japanese Rain Goggles. In the context you are to assume this is like a Dirty Sanchez, Dutch Oven, or similar act.
She was unbelievable in bed. She just gave me a set of Japanese Rain Goggles, like I've never had before.
by Madeyoulookituptoo November 25, 2010
This is a sexual act where a man places his balls over a woman's eyes while he is ejaculating.
He gave her some Japanese rain goggles during sex.
by Gunny McGunns November 23, 2010
At the climax of a sexual encounter, the post-coital matter becomes airborne at an angle in which the recipient is caused to squint their eyes in anticipation. In that moment, the aforementioned distributor will, in an act of heroism, stretch the scrotal sack to cover the intended recipients' (then slanted) ocular cavities, thus creating Japanese Rain Goggles.
She finally accepted my relationship request on Facebook, solely due to my flawless execution of the Japanese Rain Goggles last night.
by 2 1/2 men, -the 1/2, + a girl November 26, 2010