Unicorn
A startup valued over $1 billion — rare when coined, then herd-like during cheap money, now rare again. Also: a candidate with an impossible combination of skills, per every job description.
Heard in the wild
“The listing wants a unicorn: PE license, coding skills, and 'reasonable salary expectations.'”
Tone check: Technical
Both meanings imply mythical rarity. The valuation kind occasionally turns out to be a horse in party costume.