[lbo-talk] zimmerman not guilty

[W. Kiernan]

Jordan Hayes: "over" is a proword which means "I'm done talking, now it's
your turn to talk" ... "out" is a proword that means "I'm done talking, no
response is necessary" ... "over and out" is thus gibberish."

lbo-talk has more than two simultaneous participants and is full-duplex
(R.I.P. Doug Englebart), and "over and out" is so common an idiom that
Google offers me "About 4,130,000 results."