verbal diarrhoea INFORMAL Meaning If someone has verbal diarrhoea, they cant stop talking. For example Janice has a real bad case of verbal diarrhoea. Its like shes afraid of silence and has to keep talking to block it out. I dont know if you could say hes got verbal diarrhoea, but Alan sure does talk a lot. ━━━━━━━━━━━━━ #Idiom_of_the_Day @EnglishoftheDay 1.9K views04:30