插一杠子

插一杠子

Literally means:

have a hand in at a wrong time

Actually means:

It figuratively means intervening or getting involved in something that has nothing to do with one's own business, sometimes with a view to controlling or changing the direction or result of the thing.

It connotes a sense of criticism. Derogatory.

比喻故意中途干预或参与不属于自己分内的事情（有时带有左右事情的进展或结果的意图）。

含指责或批评的口吻。具有贬义色彩。