'do-si-do' definitions:

Definition of 'do-si-do'

(from WordNet)
noun
A square-dance figure; two dancers approach each other and circle back to back before returning to their original places

Definition of 'do-si-do'

From: GCIDE
  • do-si-do \do`-si`-do"\, n. [from dos-[`a]-dos, back to back.] a movement in square-dancing in which two dancers move around each other in a back-to-back position, and return to their original places. [PJC]