couple up

verb2

1. •
   To put into a couple; to put into, or connect together as, a group of two.

   • It is utterly impossible for any factory in the United States to couple up 8,000 feet of hose within ten hours unless they had thirty or forty men on and have the couplings made, […] — 1892
2. •
   To get into pairs; to become a group of two.

   • For this next challenge, you'll need to couple up with someone.