One of the mysteries of the English language finally explained.
2Specifically. Originally in the speech of jazz musicians and associated circles: used as a general form of address, especially between men, to indicate familiarity, amicability, or equality between the speaker and the person addressed. Compare "daddy". Now dated, and chiefly in ironic or humorous use.
Early 20th century; earliest use found in School Journal. From daddy + -o.
In this article we explore how to impress employers with a spot-on CV.