What does the idiom bugged mean?

The term bugged has several slang meanings:

bugged - bothered, or pestered (his little brother bugged him until he agreed)

bugged - monitored by a hidden microphone, or by a tappedtelephone, which secretly listens in on conversations (the FBI bugged his office and his phone)

bugged out (eyes) - eyes opened wide, apparently bulging (as if startled, scared, or shocked)

bugged out (military) - fled; made a hasty, or disorganized retreat