At reference.com, all get out is glossed as “in the extreme; to the utmost degree”, and at thefreedictionary.com as
an unimaginably large amount; “British say ‘it rained like billyo’ where Americans say ‘it rained like all get out’”
Of get-out, etymonline.com says only “to indicate a high degree of something, attested from 1838”. A thread at ask.metafilter.com includes several speculations about the origin of the phrase “as all get-out” but I think has little or no convincing evidence to support any of the theories.
Is there any good evidence about the origin of this phrase?
Best Answer
Here is the entry for all get-out in Harold Wentworth, American Dialect Dictionary (1944):
The Twain quotation is from Huckleberry Finn (1884). Here is the dialogue where it appears:
The earliest instances of the phrase in a Google Books search use the forms "as all git out" and "like all git out." From Alexander Stimson, Easy Nat: Or, The Three Apprentices (1854):
From Thomas Halliburton, The Americans at Home; or, Byeways, Backwoods, and Prairies (1855):
From Yankee-notions, volume 5 (1856[?]) [combined snippets]:
From James De Koven, "The Dorchester Polytechnic Academy—Dr. Neverasole, Principal," in The Church Register (November 1869):
And from Emerson Bennett, The Outlaw's Daughter: Or, Adventures in the South (1874):
An Elephind search of newspaper databases turns up a number of additional matches, including two from the late 1850s. From "A Fourth of July Visit ter Bostun!" in the [Indianapolis] Indiana Daily Sentinel (August 18, 1858):
And from "Fairs," in the [Clarksville, Texas] Standard (December 31, 1859):
All of these examples are from North America, and they suggest that the expression was well established by the time Mark Twain used it.