Core Competency
What an organization is genuinely best at. Strategy-literature term used two ways: 'invest here' and — as 'that's not our core competency' — the polite corporate no.
Heard in the wild
“Fleet maintenance isn't our core competency; outsource it.”
Tone check: Professional
Legitimate strategy concept. Also the most dignified way ever invented to say 'we'd be bad at that.'