よこやり
interruption; interference; butting in
Also written 横やり、横ヤリ
Noun
私わたしの計画けいかくに横よこやりを入いれないでください。
Please don't interfere with my plan.
ふたりでまじめな話はなしをしているんだから、君きみ、無責任むせきにんな横槍よこやりを入いれないでほしいんだけど。
Hey, we're trying to have a serious discussion here so I'd appreciate it if you wouldn't butt in so irresponsibly.