Green’s Dictionary of Slang

spaghetti n.

[stereotyping]

1. (orig. US) an Italian.

[UK]Wodehouse Psmith Journalist in World of Psmith (1993) 267: If the rent collector had been here it is certain, I think, that Comrade Spaghetti, or whatever you said his name was, wouldn’t have been.
[US]‘Dean Stiff’ Milk and Honey Route 38: Italian hobos are equally rare. They are ‘wops’ or ‘spaghettis’.
[US]Monteleone Criminal Sl. (rev. edn).
[Aus]A. Buzo Front Room Boys Scene v: Get a load of Joe Spaghetti.
[US]P. Thomas Down These Mean Streets (1970) 24: There were a few dirty looks from the spaghetti-an’-sauce cats, but no big sweat.
[US]Maledicta II:1+2 (Summer/Winter) 170: Spaghetti [...] Any Italian, or person of Italian ancestry, after the Italian dietary staple.
[US]M. La Sorte La Merica (2003) 138: An Italian was not an Italian. He was a wop, dago, duke, gin, tally, ghini, macaroni or spaghetti.
[US]H. Rawson Dict. of Invective (1991) 229: spaghetti [...] an Italian.

2. in attrib. use of sense 1.

[US]Eve. Bulletin (Honolulu) 31 Dec. 10/3: Jim Flynn, the Pueblo fireman, or as he is known in spaghetti circles, Antonio Chiargillo.

SE in slang uses

In compounds

spaghetti bender (n.) (also spaghetti eater, …guzzler, …twister)

an Italian.

[Aus]Bulletin (Sydney) 26 Nov. 44/2: The Dago waits for the traybit and I’m up against it once more. While I’m roominatin’, this spaghetti-eater gets seized with the idea that I’m a takedown.
[US]M. West Babe Gordon (1934) 19: Give me a healthy spaghetti-twister any time.
[US]J.T. Farrell Gas-House McGinty 19: You’re gettin’ so much like them garlic-eatin’ spaghetti-guzzlers over there [...] everybody’ll call you August the Wop.
[US]P. Thomas Down These Mean Streets (1970) 26: Colored people, Puerto Ricans like me, an’—even spaghetti-benders like you.
[US]J.D. Horan Blue Messiah 35: You can see ’em sittin’ on the stoops in Guinea Alley. Spaghetti eaters.
[US]Maledicta II:1+2 (Summer/Winter) 170: Spaghetti-eater Any Italian, or person of Italian ancestry, after the Italian dietary staple.
[US]Maledicta VII 23: Italians have long been called [...] spaghetti bender, spaghetti eater.
[US]N. Heard House of Slammers 180: It showed much greater contempt than did Wop, Guinea, or spaghetti-bender.
[US]H. Rawson Dict. of Invective (1991) 13: The French have long been reviled as frogs, [...] the British as limeys, the Mexicans as chili eaters, the Italians as spaghetti benders.
[US]M. La Sorte La Merica 138: An Italian was not an Italian. He was a wop, dago, duke, gin, tally, ghini, macaroni or spaghetti or spaghetti bender.
[US]G. Pelecanos (con. 1972) What It Was 115: ‘What’d the white boys look like?’ said Jones. ‘Spaghetti benders’.
spaghetti corner (n.)

(US) an Italian community in an urban area.

[US]Maledicta IX 57: Spaghetti Corner n [C] Italian community within an urban area.
spaghetti head (n.) [-head sfx (1)]

1. (US) an Italian.

[US](con. 1960s) R. Price Wanderers 162: Ey Ey Ey, whada you thinka so fonny, you stoonatz spaghetti-heads?
[US]Maledicta VII 23: Italians have long been called [...] spaghetti head.

2. a stupid person.

T. Yacavone N.Y. Times n.p.: You wonder why kids are spacey? Watch enough of this and you turn into a spaghetti-head [R].
spaghetti junction (n.) (also spaghetti bowl)

a complex of motorways forming a multi-levelled interchange, esp. the Gravelly Hill interchange between the M1 and M6 outside Birmingham, UK.

[US]L. Dills CB Slanguage 102: Spaghetti Bowl: major highway interchange.
[UK]F. Norman Dead Butler Caper 68: Apart from getting snarled up in a spaghetti junction somewhere along the way – dual carriageways whizzing off it in all directions, furiously getting nowhere – it looked as though the old girl was going to get us to our destination.
spaghetti western (n.) (also spag)

(orig. US) a cowboy film, usu. made in Europe by Italian directors.

[US]Time 5 Apr. 38: As a swaggering bad guy in spaghetti westerns, Berger began to command fees.
[US]C. Hiaasen Tourist Season (1987) 312: ‘Maybe I ought to say a prayer or something. Isn’t that what you’re supposed to do when you kill somebody?’ ‘Only in spaghetti westerns.’.
[UK]Indep. on Sun. Rev. 25 July 53: The spaghetti western became respectable.
[UK]Guardian Rev. 19 Feb. 5: The yellow Almerian skies under which spags were cheaply shot.
[UK]Indep. on Sun. Rev. 23 Jan. 57: Sergio Leone, whose 30-year-old career included [...] the creation of the spaghetti western.
spaghetti works (n.)

(US) an Italian restaurant.

[US]S. Ford Shorty McCabe 64: The spaghetti works was in full blast, with a lot of husky low-brows goin’ in and out.

In phrases

Spaghetti and Macaroni

(US) sign used outside bars that which serve neither dish, but are patronised by a sadomasochistic clientele.

[US]Murray & Murrell Lang. Sadomasochism.