A slang term for sexual intercourse. The term was coined by Japanese students who were learning English. The term is often combined with a pelvic thrust motion and asked n the form of a question, as if asking if a person is suitable for sexual intercourse.
Boy 1: points at girl, while performing a pelvic thrust motion Waist-shake?
Boy 2: Oh, yes, waist-shake.
The girl at this point, has no idea what is going on.
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