1 definition by Louis Gilbert

Noun - Bummish is the universal language spoken and understood only by the homeless. While the origins are unknown, Bummish is believed to have been influenced from Classical Greek and Latin and evolved due to elisions of the ablative forms of both these languages.
The man over there is speaking a similar language to Bummish, he is probably homeless.

Nick and Perry have studied Bummish so long they are able to freely converse with homeless people and not get attacked.
by Louis Gilbert December 10, 2009
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