What does "Wall-to-wall and Tree-top Tall" mean?

If you hear a truck driver say "Wall-to-wall and Tree-top Tall" on their CB radio, it's just another way to say "Signal is crystal clear." Sometimes shortened to "Wall-to-wall." You may also hear "Wall-to-wall and Ten Feet Tall." There are hundreds of other popular CB slang phrases - to learn more, check out the links below or browse the rest of our online CB slang dictionary.