From Longman Dictionary of Contemporary Englishrun/go/drive etc like the clappersrun/go/drive etc like the clappersFAST/QUICK British English informal to run, drive etc very fast → clapper
Examples from the Corpus
run/go/drive etc like the clappers• Male speaker Inside you are going like the clappers because you are nervous and the tension is building up.• Little legs going like the clappers. 