team up with
Form an association with, as in Our pediatrician is teaming up with specialists in such areas as orthopedics and cardiology. This expression alludes to the harnessing together of draft animals, such as oxen. [First half of 1900s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.