From Longman Dictionary of Contemporary Englishhow (are) you doing?how (are) you doing?spoken used when you meet someone to ask them if they are well, happy etc Hi Bob, how you doing? → do
Examples from the Corpus
how (are) you doing?• Hiya George how are you doing?• William Yes-hey, how you doing?• How you doing, Mr West?• How are you doing on those? 