know / tell sb a thing or two (about sb / sth)
瞭解/透露有用的(或有趣的、意外的)資訊;有所瞭解/披露;見多識廣
to know / tell sb some useful, interesting or surprising information about sb / sth
She's been married five times, so she knows a thing or two about men!她結過五次婚,所以對男人有所瞭解。
釋義來自《牛津高階英漢雙解詞典》第 9 版