The "language" that one hears when passing by a homeless member of society. Acquired over time, bum speak leads one to gradually speak to oneself, resulting in a language that cannot be easily understood by the general public. Sometimes accompanied by homeless banter, or your average mumble jumble, bum speak can not always be ignored since it is often coupled with random bursts of excessive vocal volumes.

Note: Bum speak can most easily be compared to the voices most famously characterized by the adults in the popular comic of Peanuts and Charlie Brown, such as the classroom teacher.
Chris: "You hear that guy back there? I couldn't understand one word he was saying as he was sitting on that bench!"
Jeff: "That, my friend, is what you call bum speak. No one understands!"
by Mr Natural June 8, 2007
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