Walmart Cattle 

Term used to describe the fat, slow people going into and out of Walmart from the parking lot, making it nearly impossible to drive past the front of the store without stopping multiple times. These people make no effort whatsoever to hurry past this grazing area to get either into the store or their cars.

"The Walmart cattle were in full force today. Traffic was backed up all the way back to Target."

Walmart Cattle by Mike Dandenault August 24, 2006