#1 eat up v. finish eating all the food on one's plate or on the table; "She polished off the remaining potatoes". wn
#2 eat up v. 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". wn
#3 eat up v. enclose or envelop completely, as if by swallowing; "The huge waves swallowed the small boat and it sank shortly thereafter". wn
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