double upverb/ˈdʌb.əl ʌp/

• 1

  To double the quantity, amount or duration of something

  • I'm going to double up my enlistment.
• 2

  card-gamespokerTo double one's amount of chips by winning an all-in pot.

• 3

  To bend, bend over; to fold; to stoop.

  • Near-synonym: double over
  • 'It is well, then, that we should be frank,' said the other. 'We both think more than we have said; let us make a clean breast. This masked figure that you saw, did you recognise it?' / 'Well, sir, it went so quick, and the creature was so doubled up, that I could hardly swear to that,' was the answer. 'But if you mean, was it Mr. Hyde?—why, yes, I think it was![…]'
• 4

  To cause (someone) to bend over; to beat up (someone).

  • I doubled him up with a swift punch to the stomach.
• 5

  To have a secondary use.

  • This unfolding sofa doubles up as a bed.
  • A little fearfully now, Pollyanna felt her way to these bags, selected a nice fat soft one (it contained Miss Polly's sealskin coat) for a bed; and a thinner one to be doubled up for a pillow, and still another (which was so thin it seemed almost empty) for a covering.
• 6

  ball-gamesbaseballgamesTo get the second out in a double play, typically referring to getting an out by beating a runner back to a base (often by throwing) after a fly ball has been caught

  • Jones snared the liner and then stepped on the bag to double up the runner.
• 7

  To employ double the usual resources for a particular purpose; to work in pairs.

  • Tactically smart, Leeds' work-rate was also admirable, their players often doubling up on Everton's main threats like Marouane Fellaini, while Victor Anichibe found he had unwelcome, unstinting company throughout.
• 8

  slangTo marry or live with someone; to share a living space.