have a run-in with somebody

have a run-in with (someone)

To have an unpleasant interaction with someone. I'm not going to her party because my ex-boyfriend will be there, and I don't want to have a run-in with him.
See also: have

have a ˈrun-in with somebody

(informal) have an argument or disagreement with somebody: She had a run-in with her son’s teacher this morning. She doesn’t think he gives the children enough homework.
See also: have, somebody