Green’s Dictionary of Slang

1. tea.

1911		J.W. Horsley Memoirs of a ‘Sky Pilot’ 253: The children gave me such words as ‘needle and thread’ for bread, ‘you and me’ for tea, ‘Jim Skinner’ for dinner.
1921		N&Q 12 Ser. IX 346: Cup You and Me. Tea.
1933		M. Marshall Tramp-Royal on the Toby 105: All I could buy was a twopenny bowl of camphor-and-moth and a penny mug of you-and-me.
1941		G. Kersh They Die with Their Boots Clean 129: ‘Gemme a you ’n’ a strike,’ meaning a Cup of You-and-Me and a Slice of Strike-Me-Dead, or bread ’n’ butter.
1960, 1975		Wentworth & Flexner DAS.
1977		D. Powis Signs of Crime 207: You and me Tea, i.e., the evening meal: ‘I am off for my you and me.’.
1980		Barltrop & Wolveridge Muvver Tongue 32: Throughout the East End ‘you and me’ means tea.

2. urination, urine [= pee n.¹ ].

1960		J. Franklyn Dict. of Rhy. Sl.
1978		Maledicta II:1+2 (Summer/Winter) 117: There are other, more general if less modern and correct, studies of Cockney rhyming slang, though they tend to skirt Tom Tit (’shit’), rattle [and hiss] (’piss’), you and me (’pee’).
1980		Barltrop & Wolveridge Muvver Tongue 42: The other function is a ‘Jimmy Riddle’, a ‘leak’, a ‘you and me’, (rhyming for ‘pee’).
1989		M. Walker How to Kiss a Crocodile 127: The giant fast bowler was desperate for a ‘you ’n me’ - legs crossed, arms crossed and maybe even his fingers crossed.
2002		Pete’s Aussie Sl. Home Page 🌐 you and me: a pee, urinate.

3. a flea.

1976

(ref. to 1930s–70s) R. Barnes Coronation Cups and Jam Jars 208: You and me Flea.

4. (bingo) the number three; occas. 23.

1981		P. Wright Cockney Dialect and Sl. 109: 3 = you an’ me.
2001		J. Burkardt ‘The Bingo Code’ Wordplay 🌐 3: you and me.
2002		(con. 1960s) M. McGrath Silvertown 223: The Walters fall to their cards, frantically marking the numbers as they’re called: two fat ladies, eighty-eight [...] Twenty-three, you and me.

5. (Aus.) a pea.

1967

‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xliii 11/3: you and mes: Vegetable peas.