A term defining a large, fatass woman. Usually used as a derogitory term and as a way to show that said woman deserves to have her fat ass put in Sea World.
Good God! Look at Shemu coming down the hall! We better get out of its path before it eats or crushes us with its giant ass thighs!
by The Original Bananaman February 21, 2009
Get the Shemumug. 
Get the shemumug. Get the Shemumug.