fatten up


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fatten (someone or an animal) up (with something)

to use something to make someone or an animal fat. We will fatten the calf up with corn. I don't know why they keep fattening up their children with so much food.
See also: fatten, up

fatten up

 (on something)
1. Lit. to get fat by eating something, The cattle fattened up on the succulent grass. The bears have to fatten up on food before they hibernate for the winter.
2. Fig. to become prosperous because of something. The corporations fattened up on easy profits and low taxes. The directors of the company fattened up even during the recession when the workers were laid off.
See also: fatten, up
References in periodicals archive ?
Yet most of the birds succeed in growing back their feathers in time to go back to sea and fatten up before beginning--again--their long march.
In the wild, Magellanic penguins live on the southernmost coasts of South America and migrate every fall: They set off on a 5-month-long swimfest north to warm waters off Brazil, where they fatten up on fish before swimming back home to mate and molt (shed all their feathers).
But Burger King seems to have made a concerted effort to fatten up its menu with bigger and badder versions of basic fast-food items.
The reason, the scientists suggest, is earlier break-up of winter ice, which leaves the bears less time to hunt and fatten up.
In fact, big is so cool that women are forking out thousands of pounds to fatten up their rear end.
And because so many pollutants, like toxaphene, become stored in fat, they accumulate most efficiently in animals that must fatten up to survive hard winters, as the subarctic Laberge fish do.
Like inactive people, deer mice (which do not hibernate) and ground squirrels (which fatten up to make it through their winter's sleep) became quite pudgy, Thompson and Wickler say.