Is anybody aware of published analysis of this interesting construction, which seems to require what I will loosely term swear words to work? I believe I've only heard it in British English:
A1 - Dave got a job at Roche.
B1 - Fuck off did he! (=No he didn't; I don't believe you)
A2 - Whales are fish, you know.
B2 - Bollocks are they. (=No they aren't)
(i) Bollocks did he! (ii) Bollocks he did! (iii) Did he bollocks! ...BUT... *(iv) *he did bollocks!* The interesting thing here is that fronting of the expletive triggers inversion, just like, e.g. a wh-word, but it is optional. – P Elliott Sep 17 '13 at 09:10