who's 'she', the cat's mother /ˈhuːz ˈʃi(ː)ðə ˈkæts ˈmʌðə(ɹ)/ phrase1 •(UK, old-fashioned) A rebuke especially directed towards children for having referred to a woman in the nominative case as "she", instead of by her name or an appropriately respectful title."She's coming on the trip with us too!""Who's 'she', the cat's mother?"