Green’s Dictionary of Slang

(Aus.) to vomit, usu. after excessive drinking.

1921		(con. WWI) E. Lynch Somme Mud 6: He’s going to be sick. Goin’ to perk.
1949		Sun. Herald (Sydney) 18 Dec. 10/3: This damn child has perked on me, and I think it’s wet me, too.
1955		N. Pulliam I Travelled a Lonely Land (1957) 237/1: perk – vomit.
1967		‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xxxviii 10/2: perk: To vomit, usually after large quantities of grog.
1972		A. Chipper Aussie Swearers Guide 33: Immigrants and visitors please note: an alternative to chundering is perking. So don’t tell him a cup of your coffee will make him perk up.
1999		G. Seal Lingo 135: As over-indulgence in alcoholic beverages may induce vomiting, the Lingo is well stocked with terms for this, including [...] perk.