not have the foggiest (idea)
成語所屬單字foggy
not have the foggiest (idea) — 慣用語
1. To have no knowledge or understanding about something.
1.慣用語
釋義
一無所知
To have no knowledge or understanding about something.
例句
Maya asked about the meeting time, but I didn't have the foggiest.
Does Brian have any clue where his keys are? He hasn't the foggiest idea.