Why does restraunt managers always leave it up to the customers to explain what "Fast" means in fast food restraunts ?

@Madeleine I worked fast food,taco bell in a food court along with hardees,and mc donalds,,,,no quality,,,,just fast,taco bell,everything in bags,

Round these parts there ain't nothin fast about it and the register help are pretty slo mentally too. That's why I wondered why the customers have to explain hurry the f*** up so I can get back to my job in time to clock in. Shouldn't have had to explain this to ya but I see where you coming from. Lol