よこやりをいれる

横槍を入れる

to interrupt; to butt in

N3Expression
Expression, Ichidan verb
to interruptto butt in

Example Sentences

ふたりでまじめな話をしているんだから、(きみ)、無責任な横槍を入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.