stack up
US /stæk ʌp/
UK /stæk ʌp/
1.
to compare with something else in terms of quality or performance
:
•
How does the new model stack up against its competitors?
•
His arguments don't really stack up when you look at the facts.
2.
to accumulate or increase in amount over time
:
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The bills started to stack up after he lost his job.
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Unread emails quickly stack up if you don't deal with them daily.