割り込んできた

cut in

→ 割り込む
phrase Rare #29,326
cut in The past form of 割り込んでくる, often describing someone interrupting a conversation or cutting into a line, usually in an unwelcome way. The てくる form can emphasize that the action came toward or intruded on the speaker's situation.
JA: 知らない人が私たちの話に割り込んできた。
EN: A stranger cut into our conversation.

私がジョン電話で話している最中に交換手割り込んできた

While I was talking to John on the phone, the operator cut in.

私が彼女に求婚していたら生意気な奴らが割り込んできた

While I was proposing to her, some insolent brats barged in.

メアリーは私たちの会話割り込んできた

Mary interrupted our conversation.

彼は突然私たちの会話割り込んできた

He suddenly interrupted our conversation.