Top Definition
a delicious frozen treat (not a real banana) sold at corner stores around the urban parts of the U.S.A
puff daddy: yo band members walk to the bronx with no sneakers and gets me a dam banana jamma or im closing the studio bitches!
by marshall.c October 15, 2007
Delicious Chocolate Banana Covered Treat, served only in the finest of school cafeterias.
"What a deal! .25 for a Banana Jamma."
by Zacario Muendez December 01, 2006

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