jaw-jaw, v. — Green’s Dictionary of Slang

jaw-jaw v.

[jaw v.¹ (1) + redup.; popularly attrib. to Winston Churchill in a speech at the White House on 26 June 1954, in the dictum: ‘To jaw-jaw is always better than to war-war’ but see cite 1942]

to talk, to converse, to discuss.

1942		Worker (Brisbane) 7 Sept.. 14/2: It’s one thing to jaw-jaw and another to begin them tricks.
1962		Taunton Courier 14 July 1/1: Rev. George Rayner says in his parish magazine that [...] the desire to ‘jaw-jaw’ comes into our parochial life.
1969		Manchester Guardian Weekly 13 Dec. 12: It is time at last to start jaw-jawing.
1989		H. Harrison Bill [...] on the Planet of Robot Slaves (1991) 176: I got more important things to do than to jaw-jaw with squashies.