The inability to accept the inevitable or obvious after an event has already happened.
Boss: You're fired!
Loser: You can't fire me, because I QUIT!
Boss: I don't know what you're quitting- I already fired you.
Loser: I QUIT, ya hear?! QUIT!!
Boss (to Secretary): Barbara, call security. We've got another case of "You can't fire me because I quit syndrome"