The type of feet that have a permanent residue on them as if they have been walking through Walmart without shoes on.
Friend 1: "Becky Sue lets her kids run through Walmart without any shoes on!"

Friend 2: "I bet they have Walmart Feet."
by khobama April 2, 2009
The gross after effect of playing drums without wearing socks or shoes.
After the concert the drummer stood up and felt the blisters on his Walmart Feet.
by hey_it's_ollie January 19, 2009
When someone walks around barefoot so much that their feet get black and dirty.
Her feet are so dirty after walking barefoot out in public, she has Walmart feet.
by LemurK5 March 10, 2019