VERB
急促而含混不清地说；激动而口齿不清地说
If you say that someone is jabbering, you mean that they are talking very quickly and excitedly, and you cannot understand them.
例句
The girl jabbered incomprehensibly...
那个女孩儿叽里咕噜地说着，谁也没听懂。
After a minute or two I left them there jabbering away.
没几分钟，我就走开了，留下他们在那儿叽里咕噜地说个不停。