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In page Valley girl:

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Valleyspeak, or valspeak, is a (stereotypical) California English social dialect and accompanying vocal features, best associated with valley girls, though elements of it may be used by other demographics, including some men of a similar background ("val dudes").[1] This sociolect became an international fad for a certain period in the 1980s and 1990s, with a peak period from around 1981 to 1985.[citation needed] Valleyspeak is popularly characterized by both the steady use of uptalk and its vocabulary.[2]