breast-plate n.
1. (Irish) a shirt.
![[Ire]](/static/img/flags/ire.png "Ireland") | Tipperary Free Press 29 June 2/6: He was dressed [in] a pair of nondescript unmentionables and a calico breast-plate vulgarly y’clept a tommy. |
2. (US) a tie that masks a dirty shirt.
![[US]](/static/img/flags/us.png "United States") | Cincinnati Enquirer 7 Sept. 10/7: Breast-plate—A tie that serves to cover the breast and hides a dirty shirt. |