Pair up
Definition 1 of 2
Pro Tip 1/3Informal Setting
Used in casual contexts, such as classroom activities or games. 
In the party game, we had to pair up and hold balloons between us.
Pro Tip 2/3Collaboration
Implies working together on a task or activity. 
For the science project, we need to pair up and share research.
Pro Tip 3/3Temporary Unions
Suggests a short-term partnership for a specific purpose. 
Let's pair up to solve this puzzle quickly.