Green’s Dictionary of Slang

1. (Ulster) sweets, cakes, desserts.

1997

Share Slanguage.

2. a sticky mess, poss. when in the form of gravy or sauce, but equally often merely resembling such foods.

1965		cited in DSUE (1984).
1972		E. Sanders Family 95: The gunge of large bins of rotting animal and vegetable matter.
1974		‘P.B. Yuill’ Hazell Plays Solomon (1976) 9: You’re overfeeding the fish [...] All that gunge at the bottom is what kills them.
1980		A. Payne ‘All Mod Cons’ Minder [TV script] 13: Boardman picks up the gunge, hovers over them, waiting for an opportunity to pour it over Bernie.
1990		J. Healy Streets Above Us (1991) 85: There, isn’t that better? Think of all the gunge that must have cleared away.
2000		Observer Screen 20 Feb. 9: Konnie Huq sitting in a bath of ‘gunge’ for Comic Relief.

3. (US) a skin irritation of the male genitals, a mythical disease believed to make a man rot from his genitals outwards, prevalent among soldiers in Vietnam.

1984

Elting, Cragg & Deal Dict. of Soldier Talk 142: Gunge [...] (Vietnam) [...] A mythical tropical disease, generally described as a venereal infection that made a man rot ‘from his genitals outward.’.