be on about sth
谈论(某事);有…的意思
to talk about sth; to mean sth
I didn't know what he was on about. It didn't make sense.我不知道他说的是什么,他说得不清不楚的。
be / go / keep on about sth贬义
抱怨;唠叨;发牢骚
to talk in a boring or complaining way about sth
Stop keeping on about it!别再唠叨那件事了!
释义来自《牛津高阶英汉双解词典》第 9 版