What is throney busses explain in 300 words?

You are probably going to have to give some context. In 60 years of using English I have never come across 'throney' - did you mean 'thorny', as in having many thorns? The usual plural of 'bus' (public transport on the road) is 'buses' , but I have occasionally seen 'busses'. Even so 'thorny buses' makes no sense to me.