(not) have the foggiest (idea/notion)

informal

to not know the answer to a question.

'Do you know where Kate's gone?' 'I haven't the foggiest.'

The photocopier's broken down again, and nobody has the foggiest idea how to fix it. (often + question word)

• put a bomb under someone
• put a bomb under something
• put a brave face on
• put a brave face on something
• put a brave front on
• put a brave front on something
• put a dampener on
• put a dampener on something
• put a damper on
• put a damper on something
• put a foot wrong
• put a gun to head
• put a gun to someone's head
• put a lid on
• Put a lid on it!
• put a lid on something
• put all cards on the table
• put all eggs in one basket
• put all your cards on the table
• put all your eggs in one basket
• put an end to
• put an end to something
• put a premium on
• put a premium on something
• put a price on