Green’s Dictionary of Slang

fanny n.2

[? fig. use of fanny n.1 (3) on model of ballocks n. (4)]

1. verbal effusiveness, usu. nonsensical.

[UK]G. Kersh Night and the City 202: All this fanny about wrestlin’, all this madam.
[UK]S. Jackson Indiscreet Guide to Soho 62: Since leaving school Joe has been a grafter and he can ‘spiel his fanny’ with the best of them.

2. any form of story (poss. mendacious) designed to elicit money or sympathy, to provide excuses etc.

[US](con. 1910s) D. Mackenzie Hell’s Kitchen 86: She was without money or food and the kiddie was ill. As she told the ‘fanny’ (story) the members of the gang all reached for their ‘kicks’.
[UK]Western Gaz. 18 Mar. 12/4: Yes, my ‘fanny’ had to be that drink was my downfall. Women always like to hear that one.
[US]H. Corey Farewell, Mr Gangster! 280: Slang used by English criminals [...] Put up the fanny – told false story.
[UK]Yorks. Post 23 May 6/5: The Pitcher’s Jargon [...] The modern ‘pitcher’ must have a good apperance, a clear and resonant voice, and a considerable knowledge of crowd psychology. [...] The tale he tells is his ‘fanny’.
[UK]J. Curtis Look Long Upon a Monkey 84: All a fanny, may I be topped if it ain’t.
[UK]G.F. Newman Villain’s Tale 8: He could brazen out any sort of fanny that he put up to the filth, or stand a quizzing from a silk in court, but this situation was different.
[UK]J. Sullivan ‘A Losing Streak’ Only Fools and Horses [TV script] And don’t give me that old fanny about a losing streak.
‘Problem Drug Use and Probation in London: An Evaluation’ at [Internet] People can feed you the biggest load of fanny.
[UK]Guardian 8 Feb. [Internet] PR types relentlessly hammer home the message that American football is ‘conquering the world’. And it’s all a load of fanny.

3. in non-verbal sense, nonsense, absurdity.

[UK](con. 1920s) J. Sparks Burglar to the Nobility 51: All the usual fanny of cell light on all night, stripping me at bedtime and surprise searches of my cell.
[Aus]P. Temple Black Tide (2012) [ebook] Now that’s good out here in the nothin. Could mean fanny in town.

4. a fit of temper.

OnLine Dict. of Playground Sl. [Internet] fanny, dicky fit n. variation on radge.

In compounds

fanny merchant (n.) [merchant n. (1)]

one who offers only empty boasts and promises.

C. Brookmyre Not the End of the World 96: It reminded him of the corpses-in-waiting you saw on telly at Conservative Party conferences, chuckling vacantly at some fanny-merchant’s dismal, scripted one-liner.
Sun. Herald mag. (Glasgow) 11 June [Internet] These moments are interspersed with the wide eyed retellings of stories he heard from Dalgish – scoring against England at Wembley, psyching out Vinnie Jones (‘a fanny merchant’ apparently).

In phrases

spin a fanny (v.)

to tell a deceitful story.

[UK]G. Ingram ‘Stir’ 65: ‘Spin a right fanny to the “Croaker”,’ advised Smith [OED].
[UK]J. Curtis They Drive by Night 83: You better say you work for the firm and all – Aberdonian Transit. Spin them a fanny.
[UK]‘Charles Raven’ Und. Nights 37: College Harry arrived [...] and span a fanny about how he was expecting a friend from the North who was coming straight on from Euston.