Sentence:  Johnny Rebs from the deep South who were plagued with <WSD>diarrhoea</WSD> after transfer to the Virginia front often informed their families that they were suffering from the `` the Virginia quickstep '' . 
Meaning of the word marked with <WSD> tags:  frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor