get involved

Become associated, especially in an emotional or sexual way. For example, He joined the company last year but never really got involved in the work, or It's been two years since Tom got involved with Jean.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.