to have the slightest idea
have
hav
hav
the
ðə
dhē
<abbr style="text-decoration: underline;" title="slightest / faintest / foggiest" >slightest</abbr>
slaɪtəst
slaitēst
idea
feɪntəst
feintēst

Definition & Meaning of "have the slightest idea"in English

to have the slightest idea
01

to have knowledge or understanding of something 

Examples
He didn’t have the faintest idea that the deadline was today. 
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