going in on

Verb

go in on (third-person singular simple present goes in on, present participle going in on, simple past went in on, past participle gone in on)

1. To contribute money for a joint purchase.
   • As they'd expected, Nino had turned them down when they'd asked their future brother-in-law to go in on the purchase.2008, Karen Tintori, Unto the Daughters, →ISBN
2. To participate in; to join.
   • For example, one veteran officer advised a rookie, “The only reason to go in on a pursuit is not to get the perpetrator but to pull the cop who gets there first offa the guy before he kills him.”1981, James M. Henslin, Down to Earth Sociology, →ISBN