power lunch noun a lunch meeting where business or deals, not eating, is the central focus US,1986
The name calls to mind the New York restaurant which started life as a Prohibition-era “speakeasy” but now is the venue for many a “power lunch.” — Walter Herdeg, GraphisPosters, p. 97, 1978
— Rachel S. Epstein and Nina Liebman, BizSpeak, p. 174, 1986