do-si-do /ˌdəʊ si ˈdəʊ $ ˌdoʊ si ˈdoʊ/ BrE AmE noun [singular]
[ Date: 1900-2000 ; Language: French ; Origin: dos-à-dos 'back-to-back' ]
an action in ↑ country dancing in which partners move around each other with their backs towards each other
—do-si-do verb [intransitive]