the.com/takeaway
Food meant to leave, or the one idea that refuses to.
means Either a meal bought to eat elsewhere, or the key point worth remembering from something.
from British and Commonwealth English, 1960s, literally food you take away from the shop; the figurative point you carry off arrived by metaphor.
American cousinIn the US it goes by takeout.
Meeting jargonCorporate decks abuse it relentlessly for action points.
Sports tooIn football, a takeaway means stealing the ball.