1 definition by nitterpixi
fatsack: n. (pronunciation: fat-sak) One who is lazy, careless or irritable. The word also commonly refers to someone who eats food excessively, obsessively, or unnecessarily.
"You're such a fatsack," Denise told Leroy emphatically when she saw him eating a third serving of pie while sitting lazily on the couch.
by nitterpixi August 6, 2010