double_up
1. [ verb ] bend over or curl up, usually with laughter or pain
Synonyms: double double_over
Examples:

"He doubled and vomited violently"

Related terms: bend
2. [ verb ] share a room or a bed designed for only one person
Related terms: share
3. [ verb ] (games) stake winnings from one bet on a subsequent wager
Synonyms: parlay
Related terms: bet_on
Similar spelling:   double_play
  double_bed
  double_bar
  double-prop
  double-park
  double_over
  double_flat
  double_bond
  double_bind
  double_bass
  double_back
  double_first
  double_fault
  double_bogey
  double_blind
  double-bass