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

v use up (resources or materials)

Synonyms:
consume, deplete, eat, exhaust, run through, use up, wipe out
occupy, take, use up
require (time or space)
Types:
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run out
exhaust the supply of
drain
deplete of resources
indulge, luxuriate
enjoy to excess
burn, burn off, burn up
use up (energy)
spend
spend completely
exhaust, play out, run down, sap, tire
deplete
surfeit
indulge (one's appetite) to satiety
overspend
spend more than available of (a budget)
underspend
spend less than the whole of (a budget, for example)
Type of:
drop, expend, spend
pay out

v finish eating all the food on one's plate or on the table

Synonyms:
finish, polish off
Types:
put away, tuck away, tuck in
eat up; usually refers to a considerable quantity of food
Type of:
eat
take in solid food

v enclose or envelop completely, as if by swallowing

Synonyms:
bury, immerse, swallow, swallow up
Type of:
close in, enclose, inclose, shut in
surround completely

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