Minge is a colloquial English term referring to a female’s pubic hair. Monger refers to any trading enterprise. A minge-monger is therefore a term of abuse used to describe a person who it is claimed sells the pubic hair of a ladies.
Simply a mixture of a Minger and a Mong, basically a disgustingly FUGLY person that should only be allowed out in daylight if they live on a council estate.