double up

1 definition found

double up - WordNet (r) 2.1 (2005) :

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