Green’s Dictionary of Slang

1. (also woppish) referring to an Italian person or to Italian culture; thus wop joint, an Italian restaurant.

1912		Van Loan ‘Sweeney to Sanguinetti to Schultz’ in Ten-Thousand-Dollar Arm 51: You’re that wop second baseman, ain’t you?
1922		Broadway Brevities Aug. 41/2: Who is the beautiful girl Jimmy Auditore is seen with constantly — and where does Jeanne E get her wop dinners since he gave her the air?
1928		R. Carr Rampant Age 165: What a name! Kinda woppish, thought Paul suspiciously.
1930		R. Whitfield Green Ice (1988) 186: We came to a wop eating place.
1944		D. Runyon Runyon à la Carte 175: A former bus boy in Vincenti’s wop restaurant in West Fiftieth Street.
1955		E. Hunter Blackboard Jungle 73: ‘I’m all wop,’ Salvodi said.
1967		L. Bruce Essential Lenny Bruce 133: The Wop comic, they used to say.
1978		L. Kramer Faggots 62: His wonderful uncut wop cock.
1984		A. Sayle Train to Hell 61: This wop photographer’s just turned up and he thinks he’s Helmut Newton.
2000		T. Udo Vatican Bloodbath 30: ‘Suffer the little children,’ he said in flawless Latin. ‘Wassat?’ barked the Pope [...] ‘You know I don’ speak that wop shit so good.’.
2012		T. Robinson ‘Angelo Death’ in Dirty Words [ebook] ‘Why do you look like every wop button man I ever met?’.

2. referring to a Spaniard or South American or to their culture.

2000

J.J. Connolly Layer Cake 95: For fuck sake shut up, you don’t have to understand anything, you wop cunt.