Green’s Dictionary of Slang

1. a woman.

1812		Vaux Vocab. of the Flash Lang.
1821		Egan Life in London (1869) 217: Jerry is in Tip Street upon this occasion and the Mollishers are all nutty upon him.
1850		Fast Man 10:1 n.p.: Take it out of that, my egg-and-coffee ‘molisher’.
1850		Worcs. Jrnl 21 Feb. 3/5: Hollad [...] said to his ‘pal’ — ‘The mollisher is sugared’ (i.e.) Wood had some money about her.
1861		(con. 1840s–50s) H. Mayhew London Labour and London Poor I 424/2: One old mollesher (woman), brought out 8 lbs. of white rags.
1900		Motherwell Times 14 Sept. 4/4: ‘Turn out of that, you!’ said the man [...] ‘Why?’ asked Nancy [i.e. a young man en travesti] ‘Why, Dolly Mollisher?’ he answer with a coarse laugh. ‘Why, because...’ .
1912		Leamington Spa Courier 20 Sept. 7/1: There are a great many tramps staying in this district at the present time [...] There is a pretty fair sprinkling of ‘monishers’ and ‘chavvies’ (women and children) .

2. a slattern.

1822		Tom and Jerry; A Musical Extravaganza 54: Mollishers, bunters.
1830		Egan Finish to the Adventures of Tom and Jerry (1889) 245: Don’t be alarmed, mollishers† [† Low women on the town].
1859, 1860		Hotten Dict. of Modern Sl. etc.
1864, 1867, 1870		Hotten Sl. Dict.

3. a thief’s mistress.

1859		Hotten Dict. of Modern Sl. etc. 63: Mollisher a low girl or woman; generally a female cohabiting with a man, and jointly getting their living by thieving.
1861		Melbourne Punch ‘City Police Court’ 3 Oct. 234/1: The Mayor. – Oh, I can voker Romany as well as you; so shut your gob, and don’t be kicksy. What’s become of your mollisher?
1870		Hotten Sl. Dict.
1882		Sydney Sl. Dict. (2 edn) 6: Mollisher - A low girl or woman, generally female cohabiting with a man who thieves.
1882		Star (Guernsey) 23 Feb. 4/2: The cross cove and molisher ought to be good-looking and well-dressed, in order the better to elbow their way through crowds [...] for exercising their fingers.
1895		C. Crowe Aus. Sl. Dict. 49: Mollisher, woman cohabiting with a man who thieves.
1904		Sun (NY) 10 July 29/4: Here is a genuine letter written in thieves’ slang, recently found by the English police [...] I gave a skister’s red thimble and slang and a cat to my mollisker stalling while we cracked the fakir’s chovey.
1949		Monteleone Criminal Sl. (rev. edn) 157: mollesher [...] mollisher the sweetheart of a criminal.