gollumish adjective1 •(informal) Having similar traits to the fictional character Gollum, including obsessiveness, sinisterness or talking in an unusual manner often punctuated by hissing sounds.2003: "I do feel a bit Gollumish about it…" —alt.support.low-carb, 12 Nov 2003 — 2003 formsmore gollumish · most gollumish