A term coined and energetically promoted by Aleks Sierz in his book In-Yer-Face Theatre: British Drama Today (2001) and in an accompanying website (see below), to refer to a new wave of British drama of the 1990s that was notable for its provocative uses of obscene language, nudity, violence, and taboo subject-matter. This feature of new 1990s drama had been noted before, and referred to by theatre critics as ‘the new brutalism’ among other labels. The leading dramatists of this new wave were Mark Ravenhill, Sarah Kane, and Anthony Neilson, and its defining works included Kane's Blasted (1995), Ravenhill's Shopping and Fucking (1996), Neilson's Penetrator (1993), Jez Butterworth's Mojo (1995), Patrick Marber's Closer (1997), and Harry Gibson's Trainspotting (1994; an adaptation of Irvine Welsh's 1993 novel). Although predominantly British, this school included some American playwrights, notably Tracy Letts (author of Killer Joe, 1994) and Phyllis Nagy (The Strip, 1995).
http://www.inyerface-theatre.com Aleks Sierz's site with glossary and lists of plays.