Green’s Dictionary of Slang

1. (US Und., also half-half-and-half) drunk, tipsy.

1825		‘Love Without Mutton is Nothing at All’ Universal Songster II 148: And father would say, when he got half-and-half, / That’s no prodigal son, but a fine fatted calf.
1833		P. Pry Reminiscences, Mishaps and Observations 32: I can tell to an old stock, every shirt [...] or washable article belonging to every half-and-half fellow in Town.
1848		Flash Dict. in Sinks of London Laid Open.
1856		Proc. Old Bailey 4 Feb. 482: I was about three sheets in the wind, and pretty well all the house were half and half.
1860		R. Nicholson Rogue’s Progress (1966) 42: You’re a half-and-half sort of fellow; you put ale upon porter.
1909		J. Ware Passing Eng. of the Victorian Era 9/2: Arfarf’an’arf (Peoples’). A figure of speech, meaning ‘drunk’, the substitution of cause for effect, the intoxication being the latter, ’arfarfanarf’ the former.

2. effeminate.

1827

W. Clarke Every Night Book 47: A whey-faced half-and-half exquisite [...] inquired of the steward, in an affected drawl, for his valet. The bone-licker was sent to him. ‘Oh, Thomas,’ lisped the creature, ’ you’re there, are you’.

3. second rate.

1843		W.T. Moncrieff Scamps of London II iii: I’ve told that half-and-half know-nothing noodle, Yorney, that the honour of Herbert is in my hands.
1847		R.F. Walond Paddiana I 16: By my sowl it is a raal gintleman, ye may be sworn; there’s no half-and-half about him.

4. married.

1908

A.N. Lyons Arthur’s 89: Ever since me an’ Thomas ’as bin ’arf and ’arf, I’ve listened for ’im to compromise ’isself.