i assume they are talking about Washers. its a backyard game similar to horseshoes. its VERY popular in Texas.
EDIT- ah, wait.. ok, thats different than what we do, but same principal. we dont use the plastic boxes.. just 4" segments of PVC pipe dug into the ground. same idea, just different set-up. still fun, both ways i am sure.. a good beer drinkin time killer.