expression
cut-in
A sudden insertion or interruption, often used in media, gaming, or conversation to describe a brief appearance, comment, or visual overlay.
ゲーム中にキャラクターのカットインが入る。
A character cut-in appears during the game.
会話にカットインして意見を言った。
I cut into the conversation and gave my opinion.
割り込み is a native Japanese term for physically cutting in line or interrupting a process, while カットイン is a loanword often used in media, gaming, or editing contexts for a sudden visual or audio insertion.
Loanword from English 'cut-in', referring to a sudden insertion or interruption.