no chance at all or only a slim hope.
Origin of Buckley's chance
First recorded in 1870–75; origin obscure
Also called Buckley's and none, Buckley's hope.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Australian and NZ slang no chance at allOften shortened to: Buckley's
Word Origin for Buckley's chance
C19: of obscure origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012