Green’s Dictionary of Slang

1. (US) a Spanish-speaking native of Central or South America; see also spic n. (3)

1899		Daily Iowa State Press 24 Aug. 7(?): ‘Do you think,’ said Sentry Laird to the alcalde after the floral offering had been made and accepted – ‘do you think for a minnit that Leftenant Bobbie done the Hobson act for the likes of you? ’Twas for the battery M of the Seventh that worruk was did last night, I can tell you those, and you’re not the first Spickety that has been here to-day to have a bookkay for him doin’ it.’.
1908		Sat. Eve. Post 14 Mar. 3/1: ‘I’d get a driver who can talk English, too, if I were you, instead of a Spigotty driver. It might save a row if you want to make more than one trip.’ ‘Spigotty?’ I asked. ‘What’s Spigotty?’ ‘Why,’ he replied, surprised at my ignorance, ‘a Spigotty is a native, of course.’.
1909		E. Ralph Estep El Toro: a Motor Car Story Of Interior Cuba 13–14: One was a country doctor who was riding miles to visit a stricken ‘spiggotie’ in some distant hut. A spiggotie is any kind of a provincial Cuban, when mentioned by an outsider. He is one of that species of uncertain race which populates the Spanish-American countries and makes it difficult for a visitor to draw a color line between negro and Castillian blood. I have also met spiggoties who were a charming mixture of Spanish, negro, and Chinese.
1913		H.A. Franck Zone Policeman 88 10: It was my first entrance into the land of the panamenos, technically known on the Zone as ‘Spigoties,’ and familiarly, with a tinge of despite, as ‘Spigs’; because the first Americans to arrive in the land found a few natives and cabmen who claimed to ‘Speaga dee Eng-leesh.’.
1918		A.N. Depew Gunner Depew 295: We had mostly ‘Spigs’ on board, which is navy slang for Spaniards.
1920		H.A. Franck Roaming Through the West Indies 239: I should like to see all those removed from our forces of occupation who have not a proper respect for Dominicans; not an unbounded respect [...] but who at least admit that our wards are human beings, [...] and not merely ‘Spigs’ and ‘niggers.’.
1934		R. Chandler ‘Finger Man’ in Pearls Are a Nuisance (1964) 109: ‘No understand, senor,’ the Mexican said purringly. ‘Don’t go dumb on me, spig,’ Ohls said dispassionately.
1941		J.M. Cain Mildred Pierce (1985) 405: If he Spanished it up, it’s all right with me. Wog or spig.
c.1943		‘Bill O. Lading’ You Chirped a Chinful!! n.p.: Spiggoty: Native of the banana countries.
1947		S. Lewis Kingsblood Royal (2001) 154: Defend [...] the Bar Association against Spigs, Wops, Kikes, Chinks, Bolos, and the Pan-Islamic Union.
1950		Goldin et al. DAUL 202/2: Spig, or Spik. A Spanish, Portuguese, Mexican, or Latin American type.

2. the Spanish language.

1914

E. O’Neill The Movie Man in Ten ‘Lost’ Plays (1995) 187: Say, you’re getting to be a regular talker of spigoty!

3. an Italian [SE spaghetti].

1949		Monteleone Criminal Sl. (rev. edn).
1983		Maledicta VII 23: Spaghetti was shortened to spag and thinned to spig. Spiggoty is from spig or from the sound of spaghetti. Italians were called spig until 1915, after which […] it variegated to spic or spick and was applied to a variety of other groups, mostly Latin Americans, especially Mexicans.