plazzy /ˈplæzi/noun 1adjective 2forms 1 noun1 •(slang) A plastic (fake) Scouser; a person from the area around Liverpool but not the city itself, especially one who claims to be Scouse.Scousers hate 'plazzies' because they aren't real Scousers but cheap wannabes with no style. — 2008 adjective2 •(slang) Synonym of plastic (“made of plastic”).‘Nar, listen, ’e foun’ these postcards in a plazzy bag. Two ’undred a’ fifteen pee each from this shop in town. […] — 1987 •(slang) Synonym of plastic (“fake”).Fucken plazzy gangsters, the lot of them. Deal a bit of weed and they think they’re the fucken boys. — 1998 formsplazzies