Green’s Dictionary of Slang

fucking-A adv.

also bricking-A, mucking-aye

completely, totally, absolutely, very well, very much, extremely; e.g. You’re fucking-A right... or fucking-A well.

[US]E. Hunter Blackboard Jungle 175: He say, ‘You go to school, Pete?’ an’ I say you fuckin’ a right.
[US](con. 1943) A. Myrer Big War 195: You’re brickin’-A right I don’t.
[UK](con. WWII) G. Sire Deathmakers 291: You mucking-aye have spoken, Captain [...] I’ll drink to that.
[US]N. Heard Howard Street 72: ‘You fuckin’ A-right!’ Jimmy snapped.
[US]H. Crews Feast of Snakes 88: He fucking-A-well had the words right.
[US]J. Ellroy Brown’s Requiem 485: You could fuckin’-A say that again.
[US]G.V. Higgins Patriot Game (1985) 198: Fuckin’A right, you are.
[US]K. Anderson Night Dogs 455: ‘New York, huh, Mister Murphy?’ ‘Fuckin’ A, right’.
[US]C. Stella Eddie’s World 12: Anybody ever asks you, you think Jimmy Mangino is tough? tell them you’re fuckin-A right you do.
T. Mulhauser Greetings from Cutler County 95: ‘A toast,’ he said. ‘To Alan.’ ‘To Alan,’ Coach said. ‘Hear, hear,’ said Larry. ‘Fucking-A right,’ said Marion ...
Smith & Zippilli ‘She Died with Grace’ in ThugLit Jan. [ebook] ‘Fuckin-A right, Carlo. Fuckin-A right’.
[US]S. King Finders Keepers (2016) 19: You’re fucking A it doesn’t.