Meaning of eat up

(verb) finish eating all the food on one's plate or on the table; "She polished off the remaining potatoes"

use up (resources or materials); "this car consumes a lot of gas"; "We exhausted our savings"; "They run through 20 bottles of wine a week"

enclose or envelop completely, as if by swallowing; "The huge waves swallowed the small boat and it sank shortly thereafter"