One of the mysteries of the English language finally explained.
Used as a humorously euphemistic substitute for a four-letter swear word (usually ‘fuck’) in "not to give a XXXX" and variants: not to care at all, not to give a damn.
1980s; earliest use found in The Sunday Times. From the trademark Castlemaine XXXX, a brand of Australian lager, punningly after the use of X to replace an unknown or suppressed name, number, etc.
In this article we explore how to impress employers with a spot-on CV.