Green’s Dictionary of Slang

1. a brother.

1930		(con. 1914–18) Brophy & Partridge Songs and Sl. of the British Soldier.
a.1945		L. Payne private coll. n.p.: Brother One & T’other.
1960		J. Franklyn Dict. of Rhy. Sl.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.

2. a mother.

1932		‘P.P.’ Rhy. Sl. 7: I’ll plaster yer ‘Jim Mace’ so’s yer ‘one and t’other’ won’t know yer.
1960		J. Franklyn Dict. of Rhy. Sl.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
1992		R. Puxley Cockney Rabbit.