The USDA
NAMP/IMPS codes for this subprimal cut are 181A and 184. 181A is obtained from 181 after removing the
bottom sirloin and the butt tender (the part of the tenderloin which is in the sirloin). 184 is obtained from 182 after removing the bottom sirloin. The food service cuts from 184 are 184A through 184F, its portion cut is 1184 and, the "subportion" cuts from 1184 are 1184A through 1184F. 181A is not further divided into food service cuts. In Australia, this cut is called D-rump in the
Handbook of Australian Meat and assigned code 2100. ==Etymology==