Green’s Dictionary of Slang

a day; thus phr. one of these odd-come-shorts, one of these days, sooner or later.

1832		J.K. Paulding Westward Ho! II 144: I shall conquer the whole nation one of these odd-come-shorts.
1867		Charleston News (SC) 15 Aug. 3/2: I must confess that our old fame fogyism has not always thought wrightsome of these odd come short days.
1879		J.C. Harris Uncle Remus vii: [note] Run fetch me de ax, en I’ll wait on you one er deze odd-come-shorts [F&H].
1892		Sun (NY) 28 Feb. 17/4: We all willl wake up some er deze odd-come-shorts an’ fin’ de Yankees des a-swarmin’ all ’roun’ here.
1897		Wichita Eagle (KS) 6 Feb. 5/3: Some of the odd-come-shorts a blue coated policeman will descend upon a nicely gotten up affair.
1900		Wichita Dly Eagle (KS) 14 Aug. 6/3: They will see a challenge floating through their feathers one of these odd come shorts.
1920		Hartford Repub. (KY) 24 Dec. 4/3: Some of the odd-come-shorts the bonded warehouses are due to be empty.
1953		Randolph & Wilson Down in the Holler 267: odd-come-short: n. An indefinite time, an odd moment. ‘Thanks for the loan of the book; I’ll fetch it back, one of these odd-come-shorts’.