double upRate this phrase:(4.00 / 2 votes)Say it
To double the quantity, amount or duration of something.

I'm going to double up my enlistment.

Additional definitions for 'double up':

double upTo have a secondary use.
double upAfter a fly ball has been caught.
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"double up." STANDS4 LLC, 2018. Web. 23 Feb. 2018. <>.

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