[1] : WordNet (r) 2.0

double up
     v 1: bend over or curl up, usually with laughter or pain; "he
          doubled and vomited violently" syn: double over, double
     2: share a room or a bed designed for only one person
     3: stake winnings from one bet on a subsequent wager syn: parlay
see also:
double over double parlay 

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Backed Up >> B Words
Backed Up, definition of term: Backed Up
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Back Up, definition of term: Back Up
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