Started in Japan. Meaning to have sex, often using a pelvic thrust when doing so.
Caused when a American English teacher told some Japanese kids on a soccer field the English words for waist and shake. So being the kids they are they put it together to come up with a new word for sex that no one really understands outside of the kids...except one guy.

to sport a boner, fly the sail at full mass, rock hard, etc.

A japanese slang term for Sexual Intercourse. Originated in a Japanese school because of an American teacher teaching English to Japanese kids translated Waist, and then Shake to some of the students. The students then took that to mean Sexual Intercourse.

A Japanese pidgeon English term for sexual intercourse.

A new Engrish word meaning to have sexual intercourse.

An engrish expression developed by Japanese Pre-teen boys for sexual intercourse. Often used as a two-word sentence to proposition one for sex.

First exposed to Americans by Azrael at http://outpostnine.com/editorials/teacher.html , editorial 51.

A japanese slang term for sexual intercourse. Often follwoed by a peliv thrust towards the object they desire to waist shake.