(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)

• can't keep your eyes off something
• can't keep your hands off
• can't keep your hands off someone
• can't make head nor tail of
• can't make head nor tail of something
• can't make head or tail of
• can't make head or tail of something
• can't put a foot wrong
• can't see beyond the end of nose
• can't see beyond the end of your nose
• can't see past the end of nose
• can't see past the end of your nose
• can't see the wood for the trees
• can't stand the pace
• can't take eyes off
• can't take eyes off someone
• can't take eyes off something
• can't take the pace
• can't take your eyes off
• can't take your eyes off someone
• can't take your eyes off something
• can't tell arse from elbow
• can't tell arse from your elbow
• can't tell your arse from elbow
• can't tell your arse from your elbow