as in sack of lump. urban translation... one who is lumpy.
lumpsack: Rosie O'Donnel
by esri February 06, 2010
Usually found on fat people; The furthest south, and usually the biggest roll on your stomach. Can be seen bulging out of high waste pants. The waste of your pants usually gets stuck in between your lumpsack, and other role.
The fat receptionist set her clip board down on her lumpsack.
by Lady Products October 04, 2008