have not the faintest conception (/the least idea) of; know nothing whatever about; not know beans about ❍ 听见他杂览倒是好的,于文章的理法,他~,……(《儒林外史》223)…and though I understand he has a flair for frivolous writing he has not the faintest conception of the rules of essays. ❍ 自从你过继在鲍老爹家,我在京里,全然不知道。(《儒林外史》325) I was in Beijing when you were adopted by the Bao family,so I knew nothing whatever about it.