Ya wanna sack fur it?

"Ya wanna sack fur it?"-Being from Chicago I had no idea what this Bagger was talking about. A sack is:

 

"a large bag of strong, coarsely woven material, as for grain, potatoes, or coal". (per dictionary.com) 

 

Where as a bag is: 

 

"a container or receptacle of leather, plastic, cloth, paper, etc., capable of being closed at the mouth; pouch." (Also courtesy of dictionary.com) 

 

I had to ask repeatedly what the person bagging my purchase said because I honestly had no clue. This is an Oklahoma expression I believe. What ran through my head as I left was, Are they called sackers? Is that an official job title? If so, wouldn't they be confused with people who fire other people?

What is a unique term you have heard in travels?