eat up

You can use the phrase eat up any time you're talking about something — or someone — who uses up or consumes resources, especially at a rapid pace.

You might decide to buy a gas-electric hybrid car if you prefer a vehicle that doesn't eat up gasoline. Airplanes also eat up fuel, and an expensive hobby like skiing can quickly eat up all of your savings if you're not careful. Eat up can literally mean "eat everything" as well, like when your grandmother sings out, "Eat up!" as she serves you a big plate of her famous broccoli casserole.

Definitions of eat up
  1. verb
    use up (resources or materials)
    synonyms: consume, deplete, eat, exhaust, run through, use up, wipe out
    occupy, take, use up
    require (time or space)
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    run out
    exhaust the supply of
    deplete of resources
    indulge, luxuriate
    enjoy to excess
    burn, burn off, burn up
    use up (energy)
    spend completely
    exhaust, play out, run down, sap, tire
    indulge (one's appetite) to satiety
    spend more than available of (a budget)
    spend less than the whole of (a budget, for example)
    type of:
    drop, expend, spend
    pay out
  2. verb
    finish eating all the food on one's plate or on the table
    synonyms: finish, polish off
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    put away, tuck away, tuck in
    eat up; usually refers to a considerable quantity of food
    type of:
    take in solid food
  3. verb
    enclose or envelop completely, as if by swallowing
    synonyms: bury, immerse, swallow, swallow up
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    type of:
    close in, enclose, inclose, shut in
    surround completely
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