horn in

Verb

 * 1)  To intrude or butt in (on something).
 * 2) * 1977-1980, Lou Sullivan, personal diary, quoted in 2019, Ellis Martin, Zach Ozma (editors), We Both Laughed In Pleasure
 * J isn't thrilled by the idea—says he's afraid she'll be taking up my time and horning in on our time together.