FCS
acronym for Fat Cock Sandwhich. Used when a customer is dissatisfied when placing an order in a terrible diner/eating establishment.
"Waitress/Waiter: What would you like to order?
Customer: One FCS, medium well.
Waitress/Waiter: FCS? What's that?
Customer: That's a Fat Cock Sandwhich"
Customer: One FCS, medium well.
Waitress/Waiter: FCS? What's that?
Customer: That's a Fat Cock Sandwhich"
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