Fired squid is dismissed, dismissal means. To put it bluntly, it's also called saying "roll up and leave", that is, roll up your cover and take it directly from the company to leave.
There is a rumor that the story is, "fried squid" in the Guangdong area before is a more expensive dishes, often the boss does not want you, he will be alone to ask you out, please eat a "fried squid" this dish, and then you will be persuaded to retire, "fried squid". The "fried squid" as the final compensation, so the workers were afraid of the boss to eat "fried squid" this dish.
Nowadays, bosses don't ask their employees to eat "fried squid", but why do they still call it "fried squid"? Have eaten the street next to the grilled squid will find that the flat squid slices in the heat will be rolled into a ball, which is the same as when you leave the roll their own quilt is the same, so slowly in order to speak a little better tone of voice, the boss or the Ministry of Personnel will be said, "you are fired", and will not be directly saying "You rolled the cover to go away.