As per Wikipedia: Thieves' cant (also known as thieves' argot, rogues' cant, or peddler's French)1 is a cant, cryptolect, or argot which was formerly used by thieves, beggars, and hustlers of various kinds in
Great Britain and to a lesser extent in other English-speaking countries. It is now mostly obsolete and used in literature and fantasy role-playing, although
individual terms continue to be used in the criminal subcultures of Britain and the
United States.
It was commonly believed that cant developed from Romany. Etymological research now suggests a substantial correlation between Romany words and cant, and equivalents, in many European languages. However, in England, Scotland, and Wales this does not apply. The Egyptians, as they were known, were a separate group from the standard vagabonds, and cant was fully developed within 50 years of their first arrival in England. Comparison of Romany words in the Winchester Confessions taken in 1616 with modern Welsh Romani show high commonality. This record also
distinguished between Romany and Cant words and again the attributions of the words to the different categories is consistent with later records.
Me personally, i think it means
YEE HAW PARTNER YEE HAVE YAWS YEE LAST YAAAAA!!!!