Zombied simply means it's on auto-pilot and has jumped the shark. That the writers have written to the lowest, cultural denominator which is now a zombie show. That the show is on it's last legs.
When a guy doesn't necessarily ghost you. It's in the middle of still a bit of talking, but you're not in a talking stage anymore. In good terms, but not friends.
"This guy just zombied me." "No, I'm not talking to him anymore, he zombied me."
When playing Black Ops Zombies from level 20 and up for about 2+ hours, and your head feels stressed, your hand hurts, and eyes water. Too many zombies for too much time.
a state in which your brain is too lazy to do anything useful and make sense, so you just stay put on one place and do nothing. But not yet total-zombied for you can still blank stare at people and say "uh huh?"
Andy : "hey dude, what's up?"
Cez : ... (blank stare at the floor)
Andy : "dude?"
cez : (slowly look at Andy) "uh huh?"
(staring back to the floor)
Andy : "damn man, you're half-zombied today"