Green’s Dictionary of Slang

get! excl.

also git!
[get v.]

get moving! start walking! go away!

[US]Harper’s Mag. Oct. 565/2: ‘George,’ after belaboring the mules till he was tired, and telling them to ‘git’ till he was hoarse, would lean back in his seat and think .
‘Mark Twain’ Sketches 12/1: Then he says, ‘one-two-three-git!’.
[Aus]H. Lawson ‘The Sleeping Beauty’ in Roderick (1967–9) I 60: And laid about him with his tongue / advising us to ‘get’.
[UK]H. Nisbet Bushranger’s Sweetheart 176: None of your damned impertinence. Get!
[UK]Marvel III:55 12: ‘Get!’ once more shouted Gouty.
[US]J. London Valley of the Moon (1914) 257: If you come monkeyin’ around here again you’ll get yours. Now get!
[US]G.H. Mullin Adventures of a Scholar Tramp 182: Ye’re nuthin’ but a lousy bum. Now, git!
[UK]M. Marshall Travels of Tramp-Royal 263: He struck a never-darken-my-door-again attitude, pointed into the rain and rapped out: ‘Get!’.
[US]S. Longstreet Decade 165: Now, get! [...] Show these shysters the door!
[Aus]D. Niland Call Me When the Cross Turns Over (1958) 19: ‘Hey, Barb, it’s me, Billy.’ ‘Get,’ Barbie said. ‘I’m having a bath.’.
[NZ]N. Hilliard Maori Girl 168: ‘Here!’ he thrust a ten-shilling note at her [...] ‘Now get!’.
[US]College Sl. Research Project (Cal. State Poly. Uni., Pomona) [Internet] Get (int.) When someone says something or does something really stupid or they are getting on your nerves just tell them to get!