Green’s Dictionary of Slang

all right, as required, in order.

1923		Wodehouse Leave it to Psmith (1993) 436: They are, I can readily imagine, distinctly oojah-cum-spiff.
1934		Wodehouse Right Ho, Jeeves 217: Things are not looking too oojah-cum-spiff at the moment.
1971		Wodehouse Much Obliged, Jeeves 181: I think we may say everything’s more or less oojah-cum-spiff.