Green’s Dictionary of Slang

shoot! excl.2

also shoot it off!
[shoot v. (5)]

(orig. US) go on! go ahead! get on with it! esp. as regards telling a story, delivering a piece of gossip etc.; often ext. as shoot – you’re faded!

[US]T.A. Dorgan in Zwilling TAD Lex. (1993) 73: Say guards, I have a puzzle for you. Shoot.
[US]J. Lait ‘Second from the End’ in Beef, Iron and Wine (1917) 186: ‘All right, then—let’s go,’ said the director. He turned to the leader, who stood with bow upraised. ‘Shoot,’ said the director.
[UK]Marvel 3 Mar. 8: Fire it at me, then [...] Shoot it off.
[UK]P. Marks Plastic Age 103: ‘I know,’ Hugh announced, excited and pleased. ‘Shoot!’.
[US]T. Thursday ‘Dead Steal’ Detective Fiction Weekly 13 June [Internet] ‘Can you keep a secret?’ ‘Shoot—you’re faded.’.
[US]R. Chandler ‘Pearls Are a Nuisance’ in Spanish Blood (1946) 101: ‘There is another matter,’ I said. ‘Shoot.’.
[UK]K. Fearing Big Clock (2002) 114: Okay. Shoot.
[US]M. Spillane One Lonely Night 78: Shoot, laddies. What’s on your mind?
[US]C. Himes Big Gold Dream 18: ‘Ratigan,’ he bellows. ‘Shoot!’.
[US]C. Bukowski Erections, Ejaculations etc. 17: ‘Shoot,’ I said, finishing my second beer.
[UK]T. Blacker Fixx 129: ‘Shoot,’ said Shelley, trying unsuccessfully to focus his eyes on me.
[US]S. Morgan Homeboy 286: Dont need the squares [...] Shoot.
[UK]T. Blacker Kill Your Darlings 231: ‘Shoot,’ I said with a polite lack of enthusiasm.