The story
Coined by British novelist P. G. Wodehouse in 1923; see quotations below. From the noun oojah-cum-pivvy (“an unknown thing; a whatsit”) and adjective spiffy (“dapper, fine”).
Etymology from Wiktionary, CC BY-SA 4.0.
oojah-cum-spiff
Today it means: In good condition, fine, excellent. Full definition →