Temporarily Obsessive: Wikipedia is your friend.
…Except in college. They get reeeally cranky when you source there.
Five by five is the best of 25 possible subjective responses used to describe the quality of communications. As receiving stations move away from an analog radio transmitting site, the signal strength decreases gradually…
”What does that even mean?!?” -Willow
I said “Five by five.” when my boyfriend asked how I was the other day. His face was like huh?
(Source: Wikipedia)