polish off
polish off {v.}, {informal}
1. To defeat easily.
The Dodgers polished off the Yankees in four straight games in the 1963 World Series.
2. To finish completely; finish doing quickly, often in order to do something else.
The boys were hungry and polished off a big steak.
Mary polished off her homework early so that she could watch TV.
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Source: A Dictionary of American Idioms
