Green’s Dictionary of Slang

Earl n.¹

In phrases

call Earl (v.) (also talk to Earl)

(Aus./US) to vomit.

1967–8		Baker et al. CUSS 93: Call earl Vomit.
1983		Eble Campus Sl. Nov. 1: blow donuts – vomit. Also [...] call Earl, talk to Earl.
1984		Eble Campus Sl. Sept. 1: barf – vomit [...] call the Irishman, call (or talk to) Earl, hug the toilet, pray to the porcelain god.
1997–2001		Online Sl. Dict. 🌐 call Earl v 1. to vomit.