(intransitive) To make or exchange good-natured jokes.
1902: We are old friends, did I not tell you? So I may, what you Americans call, josh with him. — Jack London,
2013, Russell Brand, Russell Brand and the GQ awards: 'It's amazing how absurd it seems' (in The Guardian, 13 September 2013)http://www.theguardian.com/culture/2013/sep/13/russell-brand-gq-awards-hugo-bossBoris, it seems, is taking it in this spirit, joshing beneath his ever-redeeming barnet that Labour's opposition to military action in Syria is a fey stance that he, as GQ politician of the year, would never be guilty of.