Green’s Dictionary of Slang

a nonsense word used to say goodbye.

1931		Rugby Advertiser 10 Apr. 10/2: ‘If any of you blighters want to ask any more questions, ask one another. Toodle-pip!’.
1933		Western Dly Press 26 July 7/5: He said to the chairman ’Tootle Pip’.
1944		Cheltenham Chron. 7 Oct. 5/2: Wells, kids, toodlepip for the present.
1958		Dly Mirror 12 June 12/2: It’s toodle-pip soon to this pip of a girl.
1961		Dly Mirror 29 July 7/1: Now it’s toodle pip to the Royal Military Academy for this [...] officer.
1975		D. Nobbs Fall and Rise of Reginald Perrin (1976) 146: Well, thanks again. Cheerio. Toodlepip.
1977		A.C.H. Smith Jericho Gun v 67: Well, tootle-pip for now [OED].
1989		Boston Globe (MA) 15 Dec. 68/1: [advert] ‘Yule have a jolly good time...Toodle-Pip!’ — Bertie Wooster.
1999		Indep. 26 Sept. 30: I’m moving off to Bournemouth. Toodle pip!
2006		Sunday Indep. (Dublin) 25 June Living 8/7: Goodbye is toodle-pip, hello is tallyho.
2012		D. O’Donnell Locked Ward (2013) 325: You know what you can do with this effluent. You can stick it right up your fucking hole. Toodle pip.