From Longman Dictionary of Contemporary Englishnot the slightest chance/doubt/difference etcnot the slightest chance/doubt/difference etcno chance, doubt etc at all I didn’t have the slightest idea who that man was. → slight
Examples from the Corpus
not the slightest chance/doubt/difference etc• But whether the parent with the yellow flowers supplies the egg or the pollen makes not the slightest difference.• I tried closing my eyes; it made not the slightest difference.• There was now not the slightest doubt that Hsu was decaying and losing her structural integrity. 