Ralph, n. — Green’s Dictionary of Slang

Ralph n.

[echoic of the noise of vomiting]

(US/Aus.) used in phrs. pertaining to vomiting.

1992

D. Burke Street Talk 2 24: Talk to Ralph/Huey on the big white phone [...] ‘Huey’ is close to the sound that one would make while vomiting.

call (for) Ralph (v.)

to vomit.

1980		Eble Campus Sl. Spring 6: toss cookies [...] call Ralph, call Hughie.
2001		‘Savannah’ on Lincoln Park RFC 🌐 Crombie did his 2 time per game ritual of calling for ralph and clearing impurities from his stomach (prior to kick off both halves).

cry Ralph (v.) (also call Ralph, cry Ruth)

to vomit.

1963–74		B. Humphries Barry McKenzie [comic strip] in Complete Barry McKenzie (1988) 70: I’m as crook as Rookwood. I reckon I might have to cry ruth pretty soonish!
1980		Eble Campus Sl. Spring 6: toss cookies [...] call Ralph, call Hughie.
1988		McGill Dict. of Kiwi Sl. 95/2: ruth vomit, phr. cry ruth; derived from the sound involved.

go to Europe with Ralph and Earl in a Buick (v.)