喋り散らす

しゃべりちらす【喋り散らす】

talk carelessly [at random]; speak thoughtlessly 《about…》; spread gossip 《about…》.

●他人の私事をしゃべり散らす gossip about the private affairs of other people

・こんなことをほうぼうでしゃべり散らされては困る. We can't have them spreading this sort of thing all over the place.