Green’s Dictionary of Slang

(Irish) a lump of phlegm.

1965		L. Dunne Goodbye to The Hill (1966) 27: He shot a big gollyer out of the window.
1981		(con. 1920s) P. Crosbie Your Dinner’s Poured Out! 220: gollier spittle.
1985		M. Johnston Around the Banks of Pimlico 78: On Sundays Johnny Tynan never came around [selling papers], we had Gollier instead. He was a tall, skinny man with a permanently runny nose and he was always spitting .
1991		B. Quinn Smokey Hollow 35: They loved being there except when their Granny hawked and dropped a big gollyer in the spittoon beside her chair.
1995		P. Boland Tales From a City Farmyard 71: In the traditional way that he sealed a deal with others, he spat a big gollier onto his toil-worn hand, and slapped it down on my scholarly hand.
2001		G. Coughlan Everyday Eng. and Sl. 🌐 Gollier (n): a big, fat spit of phlegmy stuff.